Hydrophytes in the Mid-Atlantic Region: Ecology, Communities, Assessment, and Diversity

Chamberlain, Sarah J.; Wardrop, Denice Heller; Fennessy, M. Siobhan; DeBerry, Doug

doi:10.1007/978-1-4614-5596-7_6

Sarah J. Chamberlain³,
Denice Heller Wardrop³,
M. Siobhan Fennessy⁴ &
…
Doug DeBerry⁵

1031 Accesses
2 Citations

Abstract

Hydrophytes, or wetland plants, are the most conspicuous and perhaps most colorful element of wetland systems. In the mid-Atlantic region, hydrophytes have been the focus of many studies, resulting in a wealth of information on wetland classification, vegetation stressors, and plant-based assessment tools. For example, exploration of the relationship between hydrophytes and the physical aspects of wetlands has led to a new hydrogeomorphic classification of headwater systems that combines three previously distinct classes. Studies of stressors have shown that plants respond differentially to human-mediated disturbances in the surrounding landscape. Reed canary grass (Phalaris arundinacea), a native but highly invasive wetland grass in regional wetlands, exhibits increased establishment, growth, and biomass in response to nutrient additions, and surprisingly, in some instances, to increased sedimentation, while blue vervain (Verbena hastata), a denizen of freshwater wetland habitats, is intolerant of increased sediment loading. Hydrophtyes have also served as the foundation for some of the most powerful wetland assessment tools in the region. Floristic Quality Assessment (FQA) and biotic indices have been developed by a number of states within the region and in the case of FQA, for the region as a whole. This chapter examines the role of hydrophytes in these studies, as well as spotlights invasive and special status wetland species found in wetland habitats in the region.

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Authors and Affiliations

Riparia, Department of Geography, Pennsylvania State University, 302 Walker Building, University Park, PA, 16802, USA
Sarah J. Chamberlain & Denice Heller Wardrop
Department of Biology, Kenyon College, 205 Higley Hall, Gambier, OH, 43055, USA
M. Siobhan Fennessy
VHB—Vanasse Hangen Brustlin, Inc., 351 McLaws Circle, Suite 3, Williamsburg, VA, 23185-6316, USA
Doug DeBerry

Authors

Sarah J. Chamberlain
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Denice Heller Wardrop
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M. Siobhan Fennessy
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Doug DeBerry
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Correspondence to Sarah J. Chamberlain .

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Editors and Affiliations

, Riparia, Department of Geography, Pennsylvania State University, Old Main 201, University Park, 16802, Pennsylvania, USA
Robert P. Brooks
, Riparia, Department of Geography, Pennsylvania State University, Old Main 201, University Park, 16802, Pennsylvania, USA
Denice Heller Wardrop

Appendix: Conservation Status Ranks for Vascular Plant Species Occurring in States within the Mid-Atlantic Region

			State conservation status rank^a
Scientific name	Common name	Life form	DE^b	MD^c	PA^d	VA^e	WV^f
Abies balsamea	Balsam fir	Tree		S1		S1	S3
Abies fraseri	Fraser fir	Tree				S1
Acer saccharum var. saccharum	Sugar maple	Tree	S3
Aconitum reclinatum	White monkshood	Forb			S1		S3
Aconitum uncinatum	Blue monkshood	Forb		S1	S2
Acorus americanus	Sweet flag	Forb			S1
Actaea pachypoda	White baneberry	Forb	S1
Actaea podocarpa	American bugbane	Forb		S2	S3
Adiantum pedatum	Maidenhair fern	Cryptogam	S3
Adlumia fungosa	Climbing fumitory	Vine		S2
Aeschynomene virginica	Sensitive joint-vetch	Forb		S1		S2
Agalinis acuta	Sandplain gerardia	Forb		S1
Agalinis auriculata	Auricled gerardia	Forb		S1	S1	S1
Agalinis maritima var. maritima	Salt marsh false foxglove	Forb	S1
Agalinis obtusifolia	Blunt-leaved gerardia	Forb		S1
Agalinis paupercula	Small-flowered false foxglove	Forb			S1	S1
Agalinis setacea	Thread-leaved false foxglove	Forb	S1	S1
Agalinis skinneriana	Midwestern gerardia	Forb		S1
Agalinis tenuifolia var. tenuifolia	Slender false foxglove	Forb	S1
Agastache nepetoides	Yellow giant hyssop	Forb	S2
Agastache scrophulariifolia	Purple giant hyssop	Forb		S1S2
Ageratina aromatica (var. aromatica)	Lesser snakeroot	Forb			S3		S1
Agrimonia gryposepala	Tall hairy agrimony	Forb	S3
Agrimonia microcarpa	Small-fruited agrimony	Forb					S1
Agrimonia pubescens	Downy agrimony	Forb	S3
Agrimonia rostellata	Woodland agrimony	Forb	S3
Agrimonia striata	Woodland agrimony	Forb	S2	S1
Agrostis mertensii	Arctic bentgrass	Graminoid					S1
Aletris aurea	Golden colic root	Forb				S1
Aletris farinosa	Colic root	Forb	S3		S1
Alisma triviale	Northern water plantain	Forb			S1
Allium oxyphilum	Nodding onion	Forb					S2
Allium tricoccum	Wild leek	Forb	S3
Alnus incana subsp. rugosa	Speckled alder	Tree/Shrub				S2
Alnus maritima (subsp. maritima)	Seaside alder	Tree/Shrub	S3	S3.1
Alnus viridis	Mountain alder	Tree/Shrub			S1
Alopecurus aequalis	Short-awn foxtail	Graminoid			S3
Amaranthus cannabinus	Waterhemp ragweed	Forb			S3
Amaranthus pumilus	Seabeach amaranth	Forb	S1	S1		S1
Amelanchier bartramiana	Oblong-fruited serviceberry	Tree			S1		S2
Amelanchier canadensis	Serviceberry	Tree			S1
Amelanchier humilis	Running serviceberry	Tree		S1	S1
Amelanchier nantucketensis	Nantucket shadbush	Tree		S1		S1
Amelanchier obovalis	Coastal juneberry	Tree			S1
Amelanchier sanguinea	Round-leaf serviceberry	Tree		S1	S2
Amelanchier stolonifera	Running juneberry	Tree		S2
Amianthium muscitoxicum	Fly-poison	Forb	S2
Ammannia coccinea	Scarlet ammannia	Forb			S2
Ammannia latifolia	Koehne's ammannia	Forb		S2
Ammophila breviligulata	American beachgrass	Graminoid			S2
Amorpha fruticosa	False indigo-bush	Shrub					S2
Ampelopsis cordata	Heartleaf peppervine	Vine					S1
Amphicarpum amphicarpon	Peanut grass	Graminoid	S2			S1
Amphicarpum purshii	Pursh's amphicarpum	Graminoid		S3
Anaphalis margaritacea	Pearly everlasting	Forb		S3		S1
Andromeda polifolia	Bog rosemary	Shrub			S3
Andromeda polifolia var. glaucophylla	Bog rosemary	Shrub					S1
Andropogon glomeratus (var. glomeratus)	Broomsedge	Graminoid			S3		S2
Andropogon glomeratus var. hirsutior	Southern bushy broom-sedge	Graminoid	S1.1
Andropogon gyrans	Elliott's beardgrass	Graminoid			S3
Anemone americana	Roundlobed hepatica	Forb	S3
Anemone berlandieri	Eastern prairie anemone	Forb				S1
Anemone canadensis	Canada anemone	Forb				S1	S1
Anemone cylindrica	Long-fruited anemone	Forb			S1
Anemone quinquefolia var. minima	Dwarf anemone	Forb					S2
Angelica atropurpurea	Great angelica	Forb	S1.1
Angelica triquinata	Filmy angelica	Forb		S1
Angelica venenosa	hairy angelica	Forb	S2
Antennaria solitaria	Single-headed pussytoes	Forb		S2	S1
Antennaria virginica	Shale barren pussytoes	Forb			S3
Anthoxanthum hirtum	Vanilla grass	Graminoid	S1
Aplectrum hyemale	Puttyroot	Forb	S1		S3
Apocynum androsaemifolium	Spreading dogbane	Forb	S1
Aquilegia canadensis	Wild columbine	Forb	S2
Arabidopsis lyrata	Lyre-leaf rockcress	Forb	S1
Arabis glabra	Tower-mustard	Forb				S1
Arabis hirsuta	Western hairy rockcress	Forb			S1
Arabis hirsuta var. adpressipilis	Hairy rockcress	Forb				S1S2
Arabis hirsuta var. pycnocarpa	Hairy rockcress	Forb					S2
Arabis missouriensis	Missouri rockcress	Forb		S1	S1
Arabis patens	Spreading rockcress	Forb		S3	S2	S2	S2
Arabis serotina	Shale barren rockcress	Forb				S2	S2
Arabis shortii	Short's rockcress	Forb		S3		S2	S1
Aralia hispida	Bristly sarsaparilla	#N/A		S1		S2
Aralia racemosa	American spikenard	#N/A	S3
Arceuthobium pusillum	Dwarf mistletoe	#N/A			S2
Arctostaphylos uva-ursi	Bearberry	Shrub		S1		S1
Arethusa bulbosa	Swamp pink	Forb			S1	S1
Arisaema dracontium	green dragon	Forb	S2
Aristida dichotoma var. curtissii	Three-awned grass	Graminoid			S1S2
Aristida lanosa	Woolly three-awn	Graminoid		S1
Aristida longespica var. longespica	Slender three-awn	Graminoid			S3S4
Aristida purpurascens (var. purpurascens)	Purple needlegrass	Graminoid			S2		S1
Aristida tuberculosa	Sea-beach three-awn	Graminoid		S1
Aristida virgata	Wand-like three-awn grass	Graminoid	S1	S1
Aristolochia macrophylla	Pipevine	Vine		S1
Armoracia lacustris	Lake cress	Forb		S1
Arnica acaulis	Leopard's bane	Forb		S1	S1
Arnoglossum atriplicifolium	Pale Indian-plantain	Forb	S2
Arnoglossum muehlenbergii	Great Indian-plantain	Forb				S2
Arnoglossum reniforme	Great Indian-plantain	Forb			S1
Artemisia campestris ssp. caudata	Beach wormwood	Forb			S1
Arundinaria gigantea (ssp. gigantea)	Giant cane	Graminoid		S2			S2
Asclepias amplexicaulis	Clasping milkweed	Forb	S3
Asclepias exaltata	Poke milkweed	Forb	S2
Asclepias hirtella	Green milkweed	Forb					S2
Asclepias lanceolata	Lance-leaf orange milkweed	Forb	S1
Asclepias longifolia	Long-leaf milkweed	Forb				S1
Asclepias purpurascens	Purple milkweed	Forb	S2			S2
Asclepias rubra	Red milkweed	Forb	S1	S1		S2
Asclepias tuberosa ssp. rolfsii	Sandhills butterflyweed	Forb				S1
Asclepias variegata	White milkweed	Forb	S2		S1
Asclepias verticillata	Whorled milkweed	Forb		S3
Asclepias viridiflora	Green milkweed	Forb	S3
Asclepias viridis	Spider milkweed	Forb					S1
Asplenium bradleyi	Bradley's spleenwort	Cryptogam			S1	S2
Asplenium pinnatifidum	Lobed spleenwort	Cryptogam		S1	S3
Asplenium resiliens	Black-stem spleenwort	Cryptogam		S1	S1
Asplenium ruta-muraria	Wall-rue	Cryptogam		S3
Asplenium septentrionale	Northern spleenwort	Cryptogam					S2
Asplenium trichomanes subsp. trichomanes	Maidenhair spleenwort	Cryptogam	S1.1
Asplenium x alternifolium	Spleenwort	Cryptogam					S1
Astragalus canadensis	Canada milkvetch	Forb		S1	S2
Astragalus distortus	Bent milkvetch	Forb		S2			S2
Astragalus neglectus	Cooper's milkvetch	Forb			S1	S2	S1
Astranthium integrifolium ssp. integrifolium	Western daisy	Forb					S1
Atriplex arenaria	Sea-beach orach	Forb		S3
Atriplex mucronata	Crested saltbush	Shrub	S3
Aureolaria flava (var. flava)	Yellow false-foxglove	Forb	S1	S3
Aureolaria pedicularia var. pedicularia	Fernleaf yellow false foxglove	Forb	S1
Baccharis halimifolia	Eastern baccharis	Shrub			S3
Bacopa innominata	Tropical waterhyssop	#N/A				S2
Bacopa rotundifolia	Roundleaf waterhyssop	#N/A				S1
Baptisia albescens	Narrowpod white wild indigo	Forb				S1
Baptisia australis (var. australis)	Wild blue indigo	Forb		S2	S2		S3
Bartonia paniculata (subsp. paniculata)	Twining bartonia	Vine	S2	S3	S3
Bartonia verna	Spring bartonia	Forb				S1
Berberis canadensis	American barberry	Shrub					S1
Betula cordifolia	Mountain paper birch	Tree				S2
Betula papyrifera	Paper birch	Tree					S2
Betula populifolia	Gray birch	Tree	S2			S1
Betula uber	Virginia round-leaf birch	Tree				S1
Bidens bidentoides	Swamp beggar-ticks	Forb			S1
Bidens bidentoides var. mariana	Maryland bur-marigold	Forb		S3.1
Bidens coronata	Tickseed sunflower	Forb		S2S3
Bidens discoidea	Small beggar-ticks	Forb			S3
Bidens laevis	Beggar-ticks	Forb			S1
Bidens mitis	Small-fruited beggar-ticks	Forb	S2	S1
Bidens trichosperma	Northern tick-seed sunflower	Forb	S3
Blephilia ciliata	Downy woodmint	Forb		S3
Blephilia hirsuta	Hairy woodmint	Forb		S2
Boechera canadensis	Sicklepod	Forb	S2
Boechera laevigata	Smooth rockcress	Forb	S1
Bolboschoenus novae-angliae	Brackish bulrush	Graminoid	S1
Boltonia asteroides	Aster-like boltonia	Forb		S1	S1
Boltonia asteroides var. glastifolia	Aster-like boltonia	Forb	S2
Boltonia montana	Valley doll's-daisy	Forb				S1
Botrychium jenmanii	Alabama grapefern	Cryptogam				S1
Botrychium lanceolatum var. angustisegmentum	Lance-leaf grape-fern	Cryptogam				S1	S1
Botrychium matricariifolium	Daisy-leaf moonwort	Cryptogam	S1				S2
Botrychium multifidum	Leathery grapefern	Cryptogam				S1
Botrychium oneidense	Blunt-lobe grape-fern	Cryptogam		S1		S2	S3
Botrychium simplex	Least grape-fern	Cryptogam				S1
Bouteloua curtipendula (var. curtipendula)	Side-oats grama	Graminoid		S2	S2		S3
Brachyelytrum erectum	Bearded short-husk grass	Graminoid	S3
Bromus ciliatus	Fringed brome grass	Graminoid				S1
Bromus kalmii	Wild chess	Graminoid		S1	S3	S1
Bromus latiglumis	Broad-glumed brome	Graminoid	S1.1	S1
Bromus nottowayanus	Nottoway's brome	Graminoid		S1S2
Bromus pubescens	Hairy wood brome	Graminoid	S2
Buchnera americana	Blue-hearts	Forb				S1S2
Buckleya distichophylla	Piratebush	Shrub				S2
Cabomba caroliniana	Carolina fanwort	Forb				S2
Cakile edentula	American Sea-rocket	Forb			S3
Calamagrostis canadensis var. canadensis	Blue-joint reedgrass	Graminoid	S1
Calamagrostis porteri (ssp. porteri)	Porter's reedgrass	Graminoid		S1			S2
Calamagrostis stricta ssp. stricta var. stricta	Northern reedgrass	Graminoid					S1
Calamovilfa brevipilis	Pine barrens reedgrass	Graminoid				S1
Calla palustris	Wild calla	Forb		S1
Callitriche terrestris	Pond water-starwort	Forb	S3
Calopogon pallidus	Pale grass-pink	Forb				S1
Calopogon tuberosus (var. tuberosus)	Tuberous grasspink	Forb	S1	S1		S2	S1
Caltha palustris	Marsh marigold	Forb	S2
Calystegia spithamaea ssp. purshiana	Shale barren bindweed	Forb					S3
Calystegia spithamaea (subsp. spithamaea)	Low bindweed	Forb	S1	S2
Camassia scilloides	Wild hyacinth	Forb			S1	S2
Campanula aparinoides	Marsh bellflower	Forb	S2
Campanula rotundifolia	Harebell	Forb		S2		S1	S3
Cardamine angustata	Slender toothwort	Forb	S2
Cardamine clematitis	Mountain bittercress	Forb				S1
Cardamine dissecta	Divided-leaved toothwort	Forb				S1
Cardamine douglassii	Purple cress	Forb		S3
Cardamine flagellifera	Bitter cress	Forb					S2
Cardamine longii	Long's bittercress	Forb	S2	S1
Cardamine maxima	Large toothwort	Forb			S2
Cardamine micranthera	Small-anthered bittercress	Forb				S1
Cardamine parviflora var. arenicola	Small-flower bittercress	Forb	S1
Cardamine pratensis	Cuckooflower	Forb		S1		S1
Cardamine pratensis var. palustris	Cuckooflower	Forb			S1
Cardamine rotundifolia	Roundleaf bittercress	Forb	S1.1	S3
Carex aestivalis	Summer sedge	Graminoid		S1			S2
Carex aggregata	Glomerate sedge	Graminoid					S2
Carex alata	Broad-winged sedge	Graminoid			S2
Carex albursina	Sedge	Graminoid		S3
Carex appalachica	Appalachian sedge	Graminoid					S2
Carex aquatilis (var. aquatilis)	Water sedge	Graminoid		S1	S2	S1	S1
Carex arctata	Black sedge	Graminoid				S1	S1
Carex argyrantha	Hay sedge	Graminoid		S3
Carex atherodes	Awned sedge	Graminoid			S1	S1	S1
Carex aurea	Golden-fruited sedge	Graminoid			S1
Carex barrattii	Barratt's sedge	Graminoid	S3	S3		S2
Carex bebbii	Bebb's sedge	Graminoid			S1	S1
Carex bicknellii	Bicknell's sedge	Graminoid			S1
Carex bromoides (subsp. bromoides)	Brome-like sedge	Graminoid	S2
Carex brunnescens	Brownish sedge	Graminoid		S3
Carex bullata	Bull sedge	Graminoid	S3	S3	S1
Carex bushii	Bush's sedge	Graminoid	S2				S2S3
Carex buxbaumii	Buxbaum's sedge	Graminoid	S1.1	S2	S3	S2	S2
Carex canescens	Hoary sedge	Graminoid					S3
Carex careyana	Carey's sedge	Graminoid		S1	S1		S1
Carex collinsii	Collin's sedge	Graminoid	S3		S2
Carex communis (var. communis)	Fibrous-root sedge	Graminoid	S2
Carex comosa	Bearded sedge	Graminoid					S2
Carex conjuncta	Soft fox sedge	Graminoid	S3
Carex conoidea	Field sedge	Graminoid	S1.1	S1		S1S2	S1
Carex crawei	Craw’s sedge	Graminoid				S2
Carex crawfordii	Crawford's sedge	Graminoid			S1
Carex crinita var. brevicrinis	Short Hair Sedge	Graminoid			S1
Carex cristatella	Crested sedge	Graminoid	S1.1			S2
Carex crus-corvi	Ravenfoot sedge	Graminoid				S1S2
Carex cryptolepis	Northeastern sedge	Graminoid			S1
Carex cumberlandensis	Sedge	Graminoid					S2
Carex davisii	Davis' sedge	Graminoid	S1	S1		S1	S1
Carex debilis var. pubera	Downy white-edge sedge	Graminoid					S1
Carex decomposita	Cypress-knee sedge	Graminoid	S1	S1		S2
Carex deflexa	Short-stemmed sedge	Graminoid					S1
Carex diandra	Lesser panicled sedge	Graminoid		S1	S2
Carex disperma	Soft-leaved sedge	Graminoid			S3
Carex eburnea	Ebony sedge	Graminoid		S1	S1		S3
Carex echinata	Little prickly sedge	Graminoid		S3
Carex emoryi	Emory's sedge	Graminoid	S1	S3			S2
Carex exilis	Coast sedge	Graminoid	S1	S1
Carex flava	Yellow sedge	Graminoid			S2	S1
Carex foenea	Sedge	Graminoid			S1
Carex formosa	Handsome sedge	Graminoid			S1
Carex garberi	Elk sedge	Graminoid			S1
Carex geyeri	Geyer's sedge	Graminoid			S1
Carex gigantea	Giant sedge	Graminoid	S3	S3
Carex glaucescens	Sedge	Graminoid		S1
Carex gracilescens	Slender sedge	Graminoid	S2
Carex gracillima	Graceful sedge	Graminoid	S3
Carex granularis	Meadow sedge	Graminoid	S3
Carex grisea	Inflated narrowleaf sedge	Graminoid	S1.1
Carex gynandra	Nodding sedge	Graminoid	S2
Carex haydenii	Cloud sedge	Graminoid		S1	S1S2		S1
Carex hirtifolia	Pubescent sedge	Graminoid	S3	S3			S2
Carex hitchcockiana	Hitchcock's sedge	Graminoid		S1
Carex hormathodes	marsh straw sedge	Graminoid	S3
Carex hyalinolepis	Shoreline sedge	Graminoid		S2S3
Carex hystericina	Porcupine sedge	Graminoid		S1
Carex interior	Inland sedge	Graminoid		S1		S1	S1
Carex jamesii	James's sedge	Graminoid	S1.1
Carex joorii	Cypress-swamp sedge	Graminoid	S2	S3
Carex juniperorum	Juniper sedge	Graminoid				S1
Carex lacustris	River-bank sedge	Graminoid	S1	S2		S1	S2
Carex lasiocarpa	Hairy-fruited sedge	Graminoid		S1	S3
Carex lasiocarpa var. americana	Slender sedge	Graminoid				S1	S1
Carex laxiculmis var. copulata	Spreading sedge	Graminoid					S1
Carex leptalea subsp. harperi	Coastal Plain bristly-stalk sedge	Graminoid	S3
Carex leptalea (subsp. leptalea)	Piedmont bristly-stalk sedge	Graminoid	S1
Carex limosa	Mud sedge	Graminoid			S2
Carex longii	Long's sedge	Graminoid			S2S3
Carex louisianica	Louisiana sedge	Graminoid		S3
Carex lucorum	Sedge	Graminoid		S1
Carex lucorum var. austrolucorum	Sedge	Graminoid					S1
Carex lupuliformis	False hop sedge	Graminoid	S2	S2	S1	S2	S1
Carex manhartii	Manhart sedge	Graminoid				S1	S1
Carex meadii	Mead's Sedge	Graminoid		S1	S1		S1
Carex mesochorea	Midland sedge	Graminoid					S2
Carex mitchelliana	Mitchell's sedge	Graminoid	S2	S2	S1
Carex molesta	Troublesome sedge	Graminoid					S3
Carex nigromarginata	Black-edge sedge	Graminoid					S3
Carex normalis	Larger straw sedge	Graminoid					S3
Carex oblita	dark green sedge	Graminoid	S2
Carex oklahomensis	Sooner sedge	Graminoid				S1
Carex oligocarpa	Eastern few-fruit sedge	Graminoid	S1.1
Carex oligosperma (var. oligosperma)	Few-seed sedge	Graminoid			S2		S1
Carex ormostachya	Spike sedge	Graminoid			S2	S1
Carex pallescens	Pale sedge	Graminoid				S1
Carex pauciflora	Few-flowered sedge	Graminoid			S1		S1
Carex paupercula	Bog sedge	Graminoid			S3
Carex pedunculata	Long-stalked sedge	Graminoid		S1			S2
Carex pellita	Woolly sedge	Graminoid	S2				S2
Carex planispicata	Sedge	Graminoid	S2	S1S2
Carex polymorpha	Variable sedge	Graminoid			S2	S2	S1
Carex prairea	Prairie sedge	Graminoid			S2	S1	S1
Carex projecta	Necklace sedge	Graminoid		S2			S3
Carex pseudocyperus	Cyperus-like sedge	Graminoid			S1
Carex purpurifera	Purple sedge	Graminoid					S1
Carex retroflexa	Reflexed sedge	Graminoid	S1
Carex retrorsa	Backward sedge	Graminoid			S1
Carex reznicekii	Reznicek's sedge	Graminoid	S3
Carex richardsonii	Richardson's sedge	Graminoid		S1	S1
Carex roanensis	Roan Mountain sedge	Graminoid			S1	S2	S1
Carex scabrata	Rough sedge	Graminoid	S1
Carex schweinitzii	Schweinitz's sedge	Graminoid			S1	S1
Carex seorsa	Weak stellate sedge	Graminoid					S1
Carex shortiana	Short's Sedge	Graminoid		S2	S3
Carex siccata	Sedge	Graminoid			S2
Carex silicea	Sea-beach sedge	Graminoid	S2	S1		S1
Carex sparganioides	Burr-reed sedge	Graminoid	S2	S1S2
Carex sprengelii	Sedge	Graminoid			S3
Carex squarrosa	Squarrose sedge	Graminoid	S3
Carex sterilis	Sterile sedge	Graminoid			S1	S1
Carex straminea	Straw sedge	Graminoid	S1	S1S2		S1
Carex striatula	Lined sedge	Graminoid	S3	S3
Carex styloflexa	Bent sedge	Graminoid					S1
Carex suberecta	Prairie straw sedge	Graminoid					S1
Carex tenera	Quill sedge	Graminoid					S1
Carex tetanica	Rigid sedge	Graminoid			S2		S1
Carex tetanica var. canbyi	Sedge	Graminoid	S1.1
Carex tonsa var. rugosperma	Shaved sedge	Graminoid					S2S3
Carex torta	Twisted sedge	Graminoid	S2
Carex trichocarpa	Hairy-fruit sedge	Graminoid	S2	S2			S1
Carex tuckermanii	Tuckerman sedge	Graminoid		S1			S1
Carex typhina	Cattail sedge	Graminoid	S3		S2		S2
Carex utriculata	Sedge	Graminoid				S1	S3
Carex venusta	Dark green sedge	Graminoid		S2
Carex vesicaria	Inflated sedge	Graminoid	S1	S1		S1S2	S2
Carex vestita	Velvety sedge	Graminoid	S2	S2		S2
Carex viridula	Green sedge	Graminoid			S1
Carex wiegandii	Wiegands sedge	Graminoid			S1
Carex willdenowii	Willdenow's sedge	Graminoid	S1
Carex woodii	Pretty sedge	Graminoid					S2
Carex x aestivaliformis	Sedge	Graminoid				S1	S1
Carphephorus bellidifolius	Sandy-woods chaffhead	#N/A				S1
Carphephorus tomentosus	Woolly chaffhead	#N/A				S1
Carya carolinae-septentrionalis	Southern shagbark hickory	Tree				S1
Carya laciniosa	Big shellbark hickory	Tree		S1	S3S4
Carya ovata	Shagbark hickory	Tree	S3
Cassia marilandica	Maryland senna	Shrub		S3
Castanea dentata	American chestnut	Tree		S2S3
Castanea pumila	Allegheny chinquapin	Tree	S3
Castilleja coccinea	Indian paintbrush	Forb		S1	S2
Caulophyllum thalictroides	Blue cohosh	Forb	S3
Ceanothus americanus	New Jersey tea	Shrub	S2
Ceanothus herbaceus	Prairie redroot	Shrub					S1
Centella erecta	Erect coinleaf	Forb	S2	S3
Centrosema virginianum	Spurred butterfly-pea	Forb		S2
Cerastium nutans	Nodding chickweed	Forb	S1
Cerastium velutinum (var. velutinum)	Field chickweed	Forb	S1.1		S3
Cerastium velutinum var. villosissimum	Goat hill chickweed	Forb			S1
Ceratophyllum echinatum	Prickly hornwort	Forb		S1			S1
Chaerophyllum procumbens (var. procumbens)	Spreading chervil	Forb	S2
Chamaecrista fasciculata var. macrosperma	Marsh wild senna	#N/A		S1
Chamaecyparis thyoides	Atlantic white cedar	Tree	S3	S3
Chamaedaphne calyculata	Leatherleaf	Shrub		S1
Chamaelirium luteum	Devil's-bit	Forb	S1	S3
Chamaesyce bombensis	Southern beach spurge	Forb				S2
Chamaesyce polygonifolia	Small sea-side spurge	Forb			S2
Chamaesyce vermiculata	Worm seeded spurge	Forb					S2
Chasmanthium latifolium	Wild oat	Graminoid			S1
Chasmanthium laxum	Slender sea-oats	Graminoid			S1
Cheilanthes alabamensis	Alabama lipfern	Cryptogam				S1
Cheilanthes eatonii	Chestnut lipfern	Cryptogam				S2	S2
Cheilanthes feei	Fee’s lipfern	Cryptogam				S1
Cheilanthes tomentosa	Woolly lipfern	Cryptogam					S1
Chelone cuthbertii	Cuthbert turtlehead	Forb				S2
Chelone obliqua	Red turtlehead	Forb		S1		S1
Chenopodium foggii	Fogg's goosefoot	Forb			S1
Chenopodium gigantospermum	Maple-leaved goosefoot	Forb		S1
Chenopodium standleyanum	Standley's goosefoot	Forb		S1			S2
Chimaphila umbellata	Prince's pine	Forb		S3
Chimaphila umbellata var. cisatlantica	Pipsissewa	Forb	S2
Chionanthus virginicus	Fringe tree	Tree			S3
Chrysogonum virginianum	Green-and-gold	Forb		S3	S1
Chrysopsis gossypina	Cottony goldenaster	Forb				S1
Chrysopsis mariana	Maryland golden-aster	Forb			S1
Cicuta bulbifera	Bulb-bearing water-hemlock	Forb	S1	S1			S1
Cimicifuga rubifolia	Appalachian bugbane	Forb				S2
Cinna latifolia	Slender wood reedgrass	Graminoid		S3
Cirsium altissimum	Tall thistle	Forb				S1
Cirsium carolinianum	Carolina thistle	Forb				S1
Cirsium horridulum	Horrible thistle	Forb		S3	S1
Cirsium muticum	Swamp thistle	Forb		S3
Cirsium pumilum	Pasture thistle	Forb	S3
Cirsium virginianum	Virginia thistle	Forb				S2
Cladium jamaicense	Sawgrass	Graminoid				S2
Cladium mariscoides	Twig rush	Graminoid			S2
Claytonia caroliniana	Carolina spring-beauty	Forb		S3
Cleistes bifaria	Spreading pogonia	Forb				S2	S1
Cleistes divaricata	Spreading pogonia	Forb		S1		S1
Clematis addisonii	Addison’s leatherflower	Vine				S2
Clematis albicoma	White-haired leatherflower	Vine					S3
Clematis catesbyana	Satin curls	Vine				S1
Clematis occidentalis (var. occidentalis)	Purple clematis	Vine		S1		S2	S2
Clematis viorna	Vase-vine leather flower	Vine	S1.1	S3	S1
Clematis viticaulis	Millboro leatherflower	Vine				S2
Clethra acuminata	Mountain pepper-bush	Shrub			S1
Clintonia alleghaniensis	Harned's swamp clintonia	Forb		S1
Clintonia borealis	Yellow clintonia	Forb		S2
Clitoria mariana (var. mariana)	Maryland butterfly-pea	Forb	S2		S1
Cocculus carolinus	Red-berried moonseed	#N/A				S1
Coeloglossum viride	Long-bracted orchis	Forb		S1
Coeloglossum viride var. virescens	Long-bract green orchis	Forb					S1
Coelorachis rugosa	Wrinkled jointgrass	#N/A	S1	S1		S1
Collinsia verna	Eastern blue-eyed Mary	Forb				S2
Collinsonia verticillata	Whorled horsebalm	Forb				S1
Commelina erecta	Sand dayflower	Forb	S2	S3
Commelina erecta var. angustifolia	Slender dayflower	Forb					S2
Commelina virginica	Virginia dayflower	Forb	S1
Comptonia peregrina	Sweet-fern	Shrub	S2
Conioselinum chinense	Hemlock parsley	Forb			S1	S1
Conopholis americana	Squaw-root	Forb	S2
Coptis trifolia	Goldthread	Forb		S1			S3
Corallorhiza bentleyi	Bentley's coralroot	Forb				S1	S1
Corallorhiza maculata var. occidentalis	Spotted coralroot	Forb				S1	S1
Corallorhiza odontorhiza	Autumn coralroot	Forb	S1
Corallorhiza trifida	Early coralroot	Forb		S1			S1
Corallorhiza wisteriana	Wister's coralroot	Forb		S1	S1		S2
Coreopsis falcata	Pool coreopsis	Forb				S1
Coreopsis linifolia	Atlantic tickseed	Forb				S1
Coreopsis pubescens var. robusta	Star tickseed	Forb					S2
Coreopsis rosea	Rose coreopsis	Forb	S1	S1
Coreopsis tripteris	Tall tickseed	Forb		S1
Coreopsis verticillata	Whorled coreopsis	Forb		S3			S1
Cornus amomum ssp. obliqua	Silky dogwood	Shrub				S2
Cornus canadensis	Bunchberry	Subshrub		S1		S1	S2
Cornus rugosa	Round-leaved dogwood	Forb		S1		S1	S1
Cornus stricta	Marsh dogwood	Shrub	S2
Corydalis aurea	Golden corydalis	Forb			S1
Corydalis flavula	Yellow corydalis	Forb	S1.1
Corydalis sempervirens	Pale corydalis	Forb		S3
Corylus cornuta	Beaked hazelnut	Shrub	S1.1	S3
Crataegus calpodendron	Pear hawthorn	Tree				S1
Crataegus mollis	Hawthorn	Tree				S1
Crataegus pennsylvanica	Red-fruited hawthorn	Tree			S2S3
Crataegus spathulata	Littlehip hawthorn	Tree					S1
Crataegus succulenta	Fleshy hawthorn	Tree				S1
Crocanthemum bicknellii	Plains frostweed	Forb				S1
Crocanthemum canadense	Canada frostweed	Forb	S3
Crocanthemum propinquum	Low frostweed	Forb	S3			S1
Crotalaria purshii	Rattle-box	Forb				S2
Crotalaria rotundifolia	Rabbit-bells	#N/A		S1
Croton glandulosus var. septentrionalis	Northern croton	Forb					S3
Cryptogramma stelleri	Slender rock-brake	Cryptogam			S1		S1
Ctenium aromaticum	Toothache grass	#N/A				S1
Cunila origanoides	Dittany	#N/A	S2
Cuphea viscosissima	Blue waxweed	Forb	S2
Cuscuta campestris	Dodder	Forb			S2
Cuscuta cephalanthi	Button-bush dodder	Forb			S2
Cuscuta compacta	Dodder	Forb			S2
Cuscuta indecora var. neuropetala	Pretty dodder	Forb					S1
Cuscuta pentagona	Field dodder	Forb			S2
Cuscuta polygonorum	Smartweed dodder	Forb		S1	S2
Cuscuta rostrata	Beaked dodder	Forb		S1		S2	S2
Cuthbertia graminea	Grass-like roselings	#N/A				S1
Cymophyllus fraserianus	Fraser's sedge	Graminoid		S1	S1		S3
Cynanchum laeve	Smooth swallow-wort	#N/A			S1
Cynoglossum virginianum (var. virginianum)	Wild comfrey	Forb	S3
Cyperus dentatus	Toothed flatsedge	Graminoid				S1
Cyperus diandrus	Umbrella flatsedge	Graminoid	S1		S2	S1
Cyperus engelmannii	Engelmann’s flatsedge	Graminoid				S1
Cyperus granitophilus	Granite-loving flatsedge	Graminoid				S1
Cyperus houghtonii	Houghton's umbrella-sedge	Graminoid		S1	S1
Cyperus hystricinus	Flatsedge	Graminoid	S1
Cyperus lancastriensis	Lancaster's flatsedge	Graminoid	S1		S2
Cyperus odoratus var. engelmannii	Engelman's rusty flatsedge	Graminoid	S3
Cyperus plukenetii	Plukenet’s flatsedge	Graminoid				S2
Cyperus refractus	Reflexed flatsedge	Graminoid	S1		S1		S3
Cyperus retrofractus	Rough cyperus	Graminoid		S2
Cyperus schweinitzii	Schweinitz's flatsedge	Graminoid			S2
Cyperus squarrosus	Awned cyperus	Graminoid					S3
Cypripedium calceolus var. parviflorum	Small Yellow lady's-slipper	Forb			S1
Cypripedium candidum	Small White lady's Slipper	Forb		S1		S1
Cypripedium kentuckiense	Kentucky lady’s-slipper	Forb				S1
Cypripedium parviflorum var. pubescens	Large yellow lady's-slipper	Forb	S1
Cypripedium reginae	Showy lady's-slipper	Forb			S2	S1	S1
Cystopteris bulbifera	Bulblet fern	Cryptogam		S3
Cystopteris laurentiana	Laurentian bladder-fern	Cryptogam			S1
Cystopteris protrusa	Lowland fragile fern	Cryptogam	S2
Cystopteris tennesseensis	Tennessee bladder-fern	Cryptogam		S1	S1	S1
Cystopteris tenuis	Bladderfern	Cryptogam	S1
Dalibarda repens	Star violet	Forb				S1	S3
Danthonia compressa	Flattened oatgrass	Graminoid	S2
Danthonia sericea	Silky oatgrass	Graminoid	S1
Dasistoma macrophylla	Mullein foxglove	Forb				S1	S2
Decodon verticillatus	Hairy swamp loosestrife	Forb					S1
Delphinium exaltatum	Tall larkspur	Forb		S1	S1		S2
Delphinium tricorne	Dwarf larkspur	Forb		S3
Deschampsia cespitosa	Tufted hairgrass	Graminoid		S1	S3	S1
Desmodium canadense	Showy tick-trefoil	Forb		S3		S1
Desmodium canescens	hoary tick-trefoil	Forb	S1
Desmodium cuspidatum (var. cuspidatum)	Toothed tick-trefoil	Forb		S1		S2
Desmodium fernaldii	Fernald's tick-trefoil	Forb	S1.1
Desmodium glabellum	Dillen's tick-trefoil	Forb	S3
Desmodium laevigatum	Smooth tick-trefoil	Forb		S3S4
Desmodium lineatum	Linear-leaved tick-trefoil	Forb		S1			S1
Desmodium marilandicum	Maryland tick-trefoil	Forb	S3
Desmodium nuttallii	Nuttalls' tick-trefoil	Forb			S2
Desmodium obtusum	Stiff tick-trefoil	Forb	S1
Desmodium ochroleucum	Cream-flowered tick-trefoil	Forb		S1
Desmodium pauciflorum	Few-flowered tick-trefoil	Forb		S1			S1
Desmodium rigidum	Rigid tick-trefoil	Forb		S1
Desmodium rotundifolium	Prostrate tick-trefoil	Forb	S3
Desmodium sessilifolium	Sessile-leaf tick-trefoil	Forb				S2
Desmodium strictum	Pineland tick-trefoil	Forb	S2	S1		S2
Desmodium tenuifolium	Slim-leaf tick-trefoil	Forb				S1
Desmodium viridiflorum	Velvety tick-trefoil	Forb		S3S4
Diamorpha smallii	Small’s stonecrop	Forb				S1
Diarrhena americana	American beakgrain	Graminoid			S1
Diarrhena obovata	Beak sedge	Graminoid				S1	S1
Dicentra cucullaria	Dutchman's breeches	Forb	S3
Dicentra eximia	Wild bleeding-hearts	Forb		S2	S1
Dichanthelium aciculare	Needle-leaf witch grass	Graminoid	S1
Dichanthelium acuminatum (var. acuminatum)	Panic grass	Graminoid					S1
Dichanthelium annulum	Serpentine panic grass	Graminoid			S2	S2
Dichanthelium boreale	Northern witch grass	Graminoid					S1
Dichanthelium caerulescens	Blue witch grass	Graminoid				S1
Dichanthelium dichotomum var. roanokense	Roanoke witch grass	Graminoid	S2
Dichanthelium ensifolium	Witch grass	Graminoid	S1
Dichanthelium hirstii	Hirst Brothers' panic grass	Graminoid	S1.1
Dichanthelium laxiflorum	Lax-flower witch grass	Graminoid			S1
Dichanthelium longiligulatum	Long-ligule witch grass	Graminoid	S1
Dichanthelium lucidum	Shining panic grass	Graminoid			S1
Dichanthelium meridionale	Matting witch grass	Graminoid					S3
Dichanthelium oligosanthes (var. oligosanthes)	Few-flower witch grass	Graminoid	S1	S2S3	S3
Dichanthelium oligosanthes var. scribnerianum	Scribner's witch grass	Graminoid	S2
Dichanthelium ravenelii	Ravenel's witch grass	Graminoid	S2	S3
Dichanthelium scabriusculum	Tall swamp witch grass	Graminoid	S1	S1
Dichanthelium scoparium	Velvety panic grass	Graminoid			S1
Dichanthelium sphaerocarpon	Roundfruit witch grass	Graminoid	S3
Dichanthelium spretum	Eaton's witch grass	Graminoid			S1
Dichanthelium strigosum	Rough-hair panic grass	Graminoid				S1
Dichanthelium wrightianum	Wright's panic grass	Graminoid	S2	S1
Dichanthelium yadkinense	Yadkin's witch grass	Graminoid	S1		S1
Didiplis diandra	Water-purslane	Forb				S1
Diervilla lonicera	Northern bush-honeysuckle	Shrub	S1
Digitaria cognata	Fall witch grass	Graminoid				S2
Digitaria filiformis	Slender crabgrass	Graminoid					S1
Digitaria serotina	Dwarf crabgrass	Graminoid				S1
Diphasiastrum tristachyum	Ground-cedar clubmoss	Bryophyte	S2
Diplazium pycnocarpon	Glade fern	Cryptogam	S1.1	S2
Dirca palustris	Eastern leatherwood	Shrub	S1.1	S2
Dodecatheon meadia	Common shooting-star	Forb		S3	S1
Dodecatheon radicatum	Jeweled shooting-star	Forb			S2
Doellingeria infirma	Cornel-leaf aster	Forb	S1	S3
Doellingeria umbellata	Flat-top white aster	Forb	S3
Drosera capillaris	Pink sundew	Forb		S1
Drosera rotundifolia (var. rotundifolia)	Roundleaf sundew	Forb	S2	S3			S3
Dryopteris campyloptera	Mountain wood-fern	Cryptogam		S1	S1
Dryopteris celsa	Log fern	Cryptogam	S2	S3	S1
Dryopteris clintoniana	Clinton's wood-fern	Cryptogam	S1	S1	S2
Dryopteris goldiana	Goldie's wood-fern	Cryptogam	S1	S2
Dryopteris marginalis	Marginal wood-fern	Cryptogam	S3
Echinacea laevigata	Smooth coneflower	Forb				S2
Echinochloa walteri	Walter's barnyard-grass	Graminoid			S1
Echinodorus cordifolius	Upright burhead	Forb		S1
Echinodorus tenellus	Dwarf burhead	Forb				S1
Elatine americana	American waterwort	Forb	S2	S3
Elatine minima	Small waterwort	Forb	S2	S1		S1
Eleocharis albida	White spikerush	Graminoid		S2
Eleocharis baldwinii	Baldwin spikerush	Graminoid				S1
Eleocharis caribaea	Capitate spikerush	Graminoid			S1
Eleocharis compressa	Flattened spikerush	Graminoid		S1	S1	S2	S2
Eleocharis elliptica	Slender spikerush	Graminoid			S2		S1
Eleocharis engelmannii	Engelmann spikerush	Graminoid		S3			S1
Eleocharis equisetoides	Horsetail spikerush	Graminoid	S1	S1		S1
Eleocharis erythropoda	Bald spikerush	Graminoid	S1
Eleocharis fallax	Creeping spikerush	Graminoid	S3
Eleocharis halophila	Salt-marsh spikerush	Graminoid	S1.1	S1
Eleocharis intermedia	Matted spikerush	Graminoid		S1	S2	S1	S1
Eleocharis melanocarpa	Black-fruited spikerush	Graminoid	S2	S1		S2
Eleocharis obtusa var. peasei	Wrights spikerush	Graminoid			S1
Eleocharis palustris	Creeping spikerush	Graminoid					S3
Eleocharis parvula	Little-spike spikerush	Graminoid			S1
Eleocharis pauciflora var. fernaldii	Few-flowered spikerush	Graminoid			S1
Eleocharis quadrangulata	Four-angled spikerush	Graminoid			S1		S2
Eleocharis robbinsii	Robbins' spikerush	Graminoid	S3	S1	S2	S1
Eleocharis rostellata	Beaked spikerush	Graminoid	S2		S1		S1
Eleocharis tenuis var. verrucosa	Slender spikerush	Graminoid			S1
Eleocharis tortilis	Twisted spikerush	Graminoid		S3
Eleocharis tricostata	Three-angle spikerush	Graminoid	S1	S1		S1
Eleocharis tuberculosa	Long-tubercled spikerush	Graminoid			S1
Eleocharis uniglumis	Creeping spikerush	Graminoid				S1
Eleocharis vivipara	Viviparous spikerush	Graminoid				S1
Eleocharis wolfii	Wolf's spikerush	Graminoid				S1
Elephantopus carolinianus	Elephant's foot	Forb			S3
Elephantopus nudatus	Smooth elephant's foot	Forb	S2
Ellisia nyctelea	Ellisia	Forb			S2
Elodea nuttallii	Nuttall waterweed	Forb					S3
Elymus hystrix	Bottlebrush wild rye	Graminoid	S2
Elymus riparius	River wild rye	Graminoid	S3
Elymus trachycaulus (ssp. Trachycaulus)	Slender wheatgrass	Graminoid			S3	S2	S2
Elymus villosus	Hairy wild rye	Graminoid	S3
Elymus virginicus var. halophilus	Salt-loving Virginia wild rye	Graminoid	S3
Endodeca serpentaria	Virginia snakeroot	#N/A	S3
Enemion biternatum	False rue-anemone	Forb				S1	S1
Epigaea repens	Trailing arbutus	#N/A	S3
Epilobium ciliatum	Northern willowherb	Forb		S1
Epilobium leptophyllum	Linear-leaved willowherb	Forb		S2S3		S2
Epilobium palustre	Marsh willowherb	Forb			S1
Epilobium strictum	Downy willowherb	Forb		S1	S3
Equisetum fluviatile	Water horsetail	Cryptogam	S1	S1		S1	S2
Equisetum hyemale subsp. affine	Scouring-rush horsetail	Cryptogam	S1
Equisetum sylvaticum	Woodland horsetail	Cryptogam	S1	S1		S1	S1
Equisetum variegatum	Variegated horsetail	Cryptogam			S1
Equisetum x ferrissii	Scouring rush	Cryptogam			S1
Eragrostis hypnoides	Teal lovegrass	Graminoid	S2
Eragrostis refracta	Meadow lovegrass	Graminoid	S2	S3S4
Erigenia bulbosa	Harbinger-of-spring	Forb		S3
Erigeron pulchellus var. brauniae	Lucy Braun's robin plantain	Forb		S1
Erigeron vernus	White-top fleabane	Forb				S2
Eriocaulon aquaticum	Seven-angled pipewort	#N/A	S2	S1		S1
Eriocaulon compressum	Flattened pipewort	#N/A	S2	S2
Eriocaulon decangulare	Ten-angle pipewort	#N/A	S1	S2		S2
Eriocaulon parkeri	Parker's pipewort	#N/A	S2	S2		S2
Eriogonum allenii	Yellow buckwheat	Forb					S2
Eriophorum gracile	Slender cottongrass	Graminoid		S1	S1
Eriophorum tenellum	Rough cottongrass	Graminoid			S1
Eriophorum virginicum	Tawny cottongrass	Graminoid	S1	S3
Eriophorum viridicarinatum	Thin-leaved cottongrass	Graminoid			S2
Eryngium aquaticum (var. aquaticum)	Rattlesnake-master	Forb	S2
Eryngium integrifolium	Savanna eryngo	Forb				S1
Eryngium yuccifolium (var. yuccifolium)	Rattlesnake-master	Forb				S2
Erysimum capitatum (var. capitatum)	Prairie rocket	Forb				S2	S1
Erythronium albidum	White trout lily	Forb		S2	S3	S2
Euonymus americanus	Bursting heart	Forb			S3S4
Euonymus atropurpureus	Wahoo	Shrub	S1
Eupatorium album var. vaseyi	Vasey's white thoroughwort	Forb	S3
Eupatorium altissimum	Tall boneset	Forb		S3
Eupatorium anomalum	Anomalous eupatorium	Forb				S1
Eupatorium godfreyanum	Vasey's eupatorium	Forb			S1S2		S2S3
Eupatorium hyssopifolium (var. hyssopifolium)	Hyssopleaf thoroughwort	Forb					S1
Eupatorium hyssopifolium var. laciniatum	Fringed boneset	Forb					S1
Eupatorium incarnatum	Pink thoroughwort	Forb				S2
Eupatorium leucolepis	White-bracted boneset	Forb	S3	S2S3
Eupatorium maculatum (var. maculatum)	Mottle joe-pye weed	Forb				S2	S1
Eupatorium pilosum	Vervain thoroughwort	Forb					S2
Eupatorium rotundifolium	Eupatorium	Forb			S3
Eupatorium serotinum	Late-flowering thoroughwort	Forb	S3
Eupatorium sessilifolium (var. sessilifolium)	Sessile-leaf thoroughwort	Forb	S1
Euphorbia exserta	Coastal-sand spurge	Forb				S1
Euphorbia ipecacuanhae	Wild ipecac	Forb			S1
Euphorbia obtusata	Blunt-leaved spurge	Forb		S1	S1
Euphorbia pubentissima	Flowering spurge	Forb					S1
Euphorbia purpurea	Darlington's spurge	Forb	S1.1	S1	S1	S2	S2
Eurybia radula	Rough-leaved aster	Forb		S1	S2	S1
Eurybia schreberi	Schreber's aster	Forb	S2
Eurybia spectabilis	Showy aster	Forb	S1	S1	S1
Eurybia surculosa	Creeping aster	Forb				S1
Euthamia tenuifolia	Grass-leaved goldenrod	Forb			S1
Eutrochium purpureum (var. purpureum)	Purple-node Joe-pye weed	Forb	S3
Festuca paradoxa	Cluster fescue	Graminoid			S1
Filipendula rubra	Queen-of-the-prairie	Forb		S1	S1S2	S2
Fimbristylis annua	Annual fimbry	Graminoid		S3	S2		S1
Fimbristylis caroliniana	Carolina fimbry	Graminoid	S2	S1S2
Fimbristylis perpusilla	Harper's fimbristylis	Graminoid	S1	S2		S1
Fimbristylis puberula (var. puberula)	Hairy fimbry	Graminoid				S1
Floerkea proserpinacoides	False mermaidweed	Forb	S3
Fraxinus nigra	Black ash	Tree	S2	S3			S3
Fraxinus profunda	Pumpkin ash	Tree			S1
Fraxinus quadrangulata	Blue ash	Tree			S1		S1
Fuirena pumila	Smooth fuirena	#N/A	S3	S2S3
Fuirena squarrosa	Hairy umbrella sedge	#N/A	S3
Galactia volubilis	Downy milkpea	Vine		S3			S2
Galearis spectabilis	Showy orchis	Forb	S3
Galium asprellum	Rough bedstraw	Forb	S2
Galium boreale	Northern bedstraw	Forb		S1
Galium concinnum	Shining bedstraw	Forb		S3
Galium hispidulum	Coast bedstraw	Forb		S1
Galium labradoricum	Labrador marsh bedstraw	Forb			S1
Galium lanceolatum	lance-leaf bedstraw	Forb	S3
Galium latifolium	Purple bedstraw	Forb		S3	S3
Galium trifidum	Marsh bedstraw	Forb			S2
Gaultheria hispidula	Creeping snowberry	#N/A		S1	S3		S3
Gaylussacia brachycera	Box huckleberry	#N/A	S1	S1	S1	S2	S2
Gaylussacia dumosa	Dwarf huckleberry	Shrub					S1
Gentiana alba	Yellow gentian	Forb					S1
Gentiana andrewsii (var. andrewsii)	Closed bottle gentian	Forb	S1.1	S2
Gentiana austromontana	Appalachian gentian	Forb					S1
Gentiana autumnalis	Pine-barren gentian	Forb				S1
Gentiana catesbaei	Elliott's gentian	Forb	S3
Gentiana linearis	Narrow-leaved gentian	Forb		S3
Gentiana saponaria	Soapwort gentian	Forb	S3		S1S2
Gentiana villosa	Striped gentian	Forb		S1	S1
Gentianella quinquefolia	Stiff gentian	Forb		S1
Gentianopsis crinita	Fringed gentian	Forb		S1		S1
Geranium bicknellii	Cranesbill	Forb			S1
Geranium robertianum	Herb robert	Forb		S1
Geum aleppicum	Yellow avens	Forb		S1			S1
Geum laciniatum	Rough avens	Forb
Geum rivale	Purple avens	Forb					S1
Geum virginianum	Pale avens	Forb	S1
Glyceria acutiflora	Sharp-scaled mannagrass	Graminoid	S2	S1			S2
Glyceria canadensis	Canada mannagrass	Graminoid	S1
Glyceria grandis (var. grandis)	American mannagrass	Graminoid	S1.1	S1		S1	S2
Glyceria laxa	Northern mannagrass	Graminoid					S2S3
Glyceria obtusa	Blunt mannagrass	Graminoid			S1
Gnaphalium uliginosum	Low cudweed	Forb				S1
Goodyera repens	Dwarf rattlesnake-plantain	Forb			S2		S1S2
Goodyera tesselata	Checkered rattlesnake-plantain	Forb			S1
Gratiola aurea	Golden hedge hyssop	Forb	S3		S1
Gratiola brevifolia	Branching hedge hyssop	Forb	S1.1
Gratiola ramosa	Branched hedge hyssop	Forb				S1
Gratiola viscidula	Short's hedge hyssop	Forb		S1
Gymnocarpium appalachianum	Appalachian oak fern	Cryptogam			S1		S2
Gymnocarpium dryopteris	Oak fern	Cryptogam		S1			S1
Gymnocladus dioicus	Kentucky coffee-tree	Tree		S1
Gymnopogon ambiguus	Eastern beardgrass	Graminoid	S1				S1
Gymnopogon brevifolius	Broad-leaved beardgrass	Graminoid		S1
Hasteola suaveolens	Sweet-scented Indian-plantain	Forb		S1		S2	S3
Hedyotis nigricans	Barren bluets	Forb				S1
Helenium brevifolium	Shortleaf sneezeweed	Forb				S2
Helenium virginicum	Virginia sneezeweed	Forb				S2
Helianthemum bicknellii	Hoary frostweed	Forb		S1	S2		S1
Helianthemum canadense	Canada frostweed	Forb					S2
Helianthemum propinquum	Frostweed	Forb			S1S3		S1
Helianthus angustifolius	Swamp sunflower	Forb	S3
Helianthus decapetalus	Thinleaf sunflower	Forb	S3
Helianthus divaricatus	Woodland sunflower	Forb	S1
Helianthus hirsutus	Sunflower	Forb			S2
Helianthus laevigatus	Smooth sunflower	Forb		S1			S2
Helianthus microcephalus	Small-headed sunflower	Forb		S1
Helianthus occidentalis (ssp. Occidentalis)	McDowell sunflower	Forb		S1		S1	S2
Heliopsis helianthoides (var. helianthoides)	Ox-eye	Forb	S1
Heliotropium curassavicum	Seaside heliotrope	Forb				S1
Helonias bullata	Swamp-pink	Forb	S2	S2		S2S3
Hemicarpha micrantha	Dwarf bulrush	Graminoid				S1
Heracleum lanatum	Cow-parsnip	Forb		S3
Heracleum maximum	Cow-parsnip	Forb	S3
Heteranthera dubia	Grassleaf mud-plantain	Forb	S2
Heteranthera multiflora	Multiflowered mud-plantain	Forb			S1	S1
Heteranthera reniformis	Kidneyleaf mud-plantain	Forb					S1
Heuchera alba	White-flowered alumroot	Forb					S2
Heuchera americana	American alumroot	Forb	S3
Heuchera americana var. hispida	Rough alumroot	Forb					S2
Heuchera caroliniana	Carolina alumroot	Forb				S1
Heuchera longiflora	Long-flowered alumroot	Forb					S2
Heuchera pubescens	Downy heuchera	Forb		S3
Hexalectris spicata (var. spicata)	Crested coralroot	Forb					S1
Hexastylis contracta	Mountain heartleaf	Forb				S1
Hexastylis virginica	Virginia heartleaf	Forb		S1
Hibiscus laevis	Halberd-leaved mallow	Forb		S3			S2
Hieracium traillii	Maryland hawkweed	Forb			S1
Hieracium umbellatum	Umbellate hawkweed	Forb			S1
Hierochloe hirta ssp. arctica	Common northern sweet grass	Graminoid			S1		S1
Hierochloe odorata (ssp. odorata)	Vanilla grass	Graminoid		S1		S1
Honckenya peploides	Sea-beach sandwort	Forb		S1
Hordeum jubatum	Fox-tail barley	Graminoid				S1
Hottonia inflata	Featherfoil	forb	S2	S1			S1
Houstonia canadensis	Canada bluets	forb				S2
Houstonia purpurea (var. purpurea)	Purple bluets	forb	S2		S1
Houstonia serpyllifolia	Creeping bluets	forb		S3	S1
Houstonia tenuifolia	Slender-leaved bluets	forb		S1
Hudsonia ericoides	Golden heather	forb	S1	S1
Hudsonia tomentosa (var. tomentosa)	False heather	forb					S1
Huperzia appalachiana	Appalachian fir-clubmoss	Bryophyte				S2
Huperzia porophila	Rock clubmoss	Bryophyte			S1		S1
Huperzia porophila	Rock clubmoss	Bryophyte				S1
Hybanthus concolor	Green violet	#N/A	S1	S3
Hydrastis canadensis	Goldenseal	Forb	S3	S2
Hydrocotyle americana	American water-pennywort	Forb	S3
Hydrocotyle ranunculoides	Floating pennywort	Forb					S2
Hydrophyllum macrophyllum	Large-leaved waterleaf	Forb		S2
Hydrophyllum virginianum	Eastern waterleaf	Forb	S3
Hylodesmum glutinosum	Large tick-trefoil	Forb	S2
Hypericum adpressum	Creeping St. John's-wort	Forb	S2	S1		S1
Hypericum boreale	Northern St. John's-wort	Forb	S1			S2
Hypericum crux-andreae	St. Peter's-wort	Subshrub	S3
Hypericum densiflorum	Bushy St. John's-wort	Shrub	S2		S3
Hypericum denticulatum	Coppery St. John's-wort	Forb	S2	S2
Hypericum dissimulatum	Disguised St. John's-wort	Forb			S2S4
Hypericum drummondii	Drummond St. John's-wort	Forb	S1.1				S1
Hypericum gymnanthum	Clasping-leaved St. John's-wort	Forb	S2	S3	S1
Hypericum hypericoides	Erect St. Andrew's cross	Subshrub	S3
Hypericum majus	Larger Canadian St. John's-wort	Forb			S2
Hypericum mitchellianum	Blue Ridge St. John's-wort	Forb					S1
Hypericum prolificum	Shrubby St. John's-wort	Shrub	S1.1
Hypericum setosum	St. John’s-wort	Forb				S1S2
Hypericum stragulum	St Andrew's-cross	Forb			S2
Hypericum virgatum	Coppery St. John's-wort	Forb					S1
Hypopitys monotropa	American pinesap	#N/A	S2
Hypoxis hirsuta	Eastern yellow stargrass	#N/A	S3
Ilex collina	Long-stalked holly	Shrub				S2	S2
Ilex coriacea	Bay-gall holly	Shrub				S2
Ilex decidua	Deciduous holly	Shrub		S2
Ilex opaca	American holly	Shrub			S2
Iliamna corei	Peter’s mountain mallow	#N/A				S1
Iliamna remota	Kankakee globemallow	#N/A				S1
Impatiens pallida	Pale jewel-weed	Forb	S3
Iodanthus pinnatifidus	Purple rocket	Forb			S1
Ionactis linariifolia	Flaxleaf aster	Forb	S2
Iresine rhizomatosa	Bloodleaf	Forb		S1
Iris cristata	Crested iris	Forb		S1	S1
Iris prismatica	Slender blue flag	Forb	S2	S1	S1
Iris verna	Dwarf iris	Forb		S1	S1
Iris virginica	Virginia blue flag	Forb		S3	S2
Isoetes engelmannii	Engelmann's quillwort	#N/A	S2	S3
Isoetes hyemalis	Winter quillwort	#N/A				S2
Isoetes riparia	Riverbank quillwort	#N/A	S1
Isoetes tenella	Spiny-spored quillwort	#N/A	S1.1
Isoetes valida	True quillwort	#N/A			S1S3		S1
Isoetes x brittonii	Quillwort	#N/A			S1S2
Isotria medeoloides	Small-whorled pogonia	forb	S1.1		S1	S2	S1
Isotria verticillata	Large whorled pogonia	forb	S3
Itea virginica	Virginia willow	#N/A			S1
Iva imbricata	Sea-coast marsh elder	Shrub				S1S2
Juglans cinerea	Butternut	Tree	S3	S2S3			S3
Juncus abortivus	Pine-barren rush	Graminoid				S1
Juncus alpinoarticulatus ssp. nodulosus	Richardson's rush	Graminoid			S2
Juncus arcticus var. littoralis	Baltic rush	Graminoid			S2
Juncus articulatus	Jointed rush	Graminoid		S1		S1S2	S2
Juncus balticus var. littoralis	Baltic rush	Graminoid				S1	S1
Juncus biflorus	Grass-leaved rush	Graminoid			S2		S2
Juncus brachycarpus	Short-fruited rush	Graminoid			S1
Juncus brachycephalus	Small-headed rush	Graminoid			S2	S2
Juncus brevicaudatus	Narrow-panicled rush	Graminoid		S2		S2
Juncus caesariensis	New Jersey rush	Graminoid		S1		S2
Juncus coriaceus	leathery rush	Graminoid	S2
Juncus debilis	Weak rush	Graminoid			S3
Juncus dichotomus	Forked rush	Graminoid			S1		S1
Juncus elliottii	Bog rush	Graminoid				S1S2
Juncus filiformis	Thread rush	Graminoid			S3		S2
Juncus longii	Long's rush	Graminoid		S1
Juncus megacephalus	Big-headed rush	Graminoid				S2
Juncus militaris	Bayonet rush	Graminoid	S2		S1
Juncus nodosus (var. nodosus)	Knotted rush	Graminoid				S1	S1S2
Juncus pelocarpus	Brown-fruited rush	Graminoid	S2	S1		S1
Juncus scirpoides	Scirpus-like rush	Graminoid			S1		S2
Juncus subcaudatus	short-tailed rush	Graminoid	S1
Juncus torreyi	Torrey's rush	Graminoid		S1	S3	S2	S2
Juncus trifidus	Highland rush	Graminoid		S1		S1	S1
Juniperus communis	Common juniper	Tree			S2
Juniperus communis var. depressa	Ground juniper	#N/A				S1
Kalmia angustifolia	Sheep laurel	Shrub	S2	S3S4		S2
Kalmia carolina	Carolina sheep laurel	Shrub				S2
Krigia biflora	Two-flowered cynthia	#N/A		S3
Krigia dandelion	Potato dandelion	#N/A		S1
Kyllinga pumila	Thin-leaved flatsedge	#N/A		S1
Lachnanthes caroliana (Lachnanthes caroliniana)		#N/A	S1	S1
Lachnocaulon anceps	Bog-buttons	#N/A				S2
Lactuca floridana	Woodland lettuce	Forb	S2
Lactuca hirsuta	Downy lettuce	Forb			S3
Larix laricina	Larch	Tree		S1			S1
Lathyrus japonicus	Beach peavine	#N/A			S2
Lathyrus ochroleucus	Wild-pea	#N/A			S1
Lathyrus palustris	Vetchling peavine	#N/A		S1	S1	S1
Lathyrus venosus	Veiny pea	#N/A		S3	S2
Lechea maritima	Beach pinweed	#N/A		S3
Lechea minor	Thyme-leaved pinweed	#N/A			S1S3
Lechea mucronata	hairy pinweed	#N/A	S2
Lechea tenuifolia	Slender pinweed	#N/A					S1
Lechea villosa	Bog-buttons	#N/A			S3S4
Ledum groenlandicum	Common Labrador-tea	#N/A			S3
Leersia hexandra	Club-headed cutgrass	#N/A		S1
Leersia lenticularis	Catchfly-grass	#N/A		S1
Lemna perpusilla	Minute duckweed	Forb			S1S3
Lemna trisulca	Star duckweed	Forb		S1		S1
Lemna turionifera	Duckweed	Forb			S1S3
Lemna valdiviana	Pale duckweed	Forb					S3
Lespedeza angustifolia	Narrowleaf bushclover	#N/A	S3		S1
Lespedeza frutescens	Violet bushclover	#N/A		S3
Lespedeza hirta (var. hirta)	Hairy bushclover	#N/A	S3
Lespedeza stuevei	Tall bushclover	#N/A	S2	S3
Leucothoe fontanesiana	Highland doghobble	Shrub				S1S2
Leucothoe racemosa	Swamp doghobble	Shrub			S2S3
Leucothoe recurva	Recurved fetterbush	Shrub					S1
Liatris pilosa	Grassleaf blazingstar	Forb	S2
Liatris scariosa	Round-head gayfeather	Forb			S2
Liatris scariosa var. nieuwlandii	Northern blazing-star	Forb					S1
Liatris spicata	Spiked blazing-star	Forb		S1
Liatris squarrosa	Scaly blazing-star	Forb		S1
Liatris squarrulosa	Appalachian gay-feather	Forb					S1
Liatris turgida	Turgid gay-feather	Forb					S2
Lilaeopsis carolinensis	Carolina lilaeopsis	Forb				S1
Lilium canadense (subsp. canadense)	Canada lily	Forb	S2
Lilium catesbaei	Southern red lily	Forb				S1
Lilium grayi	Gray’s lily	Forb				S2
Lilium michauxii	Carolina lily	Forb					S1
Lilium philadelphicum (var. philadelphicum)	Wood lily	Forb					S2S3
Lilium pyrophilum	Sandhills lily	Forb				S1
Limnobium spongia	American frog's-bit	Forb	S2	S1
Limosella australis	Mudwort	Forb		S2
Lindernia dubia var. anagallidea	False pimpernel	Forb					S2
Linnaea borealis	Twinflower	Forb			S1
Linnaea borealis ssp. americana	Twinflower	Forb					S1
Linum intercursum	Sandplain flax	Forb	S1	S2	S1
Linum lewisii var. lewisii	Prairie flax	Forb					S2
Linum sulcatum (var. sulcatum)	Grooved yellow flax	Forb		S1	S1		S1
Liparis liliifolia	Large twayblade	Forb	S2	S2S3
Liparis loeselii	Loesel's twayblade	Forb		S1S2		S2	S3
Lipocarpha maculata	American lipocarpha	Graminoid				S1
Lipocarpha micrantha	Small-flowered hemicarpha	Graminoid		S1	S1
Listera australis	Southern twayblade	Forb	S3	S3	S1
Listera cordata (var. cordata)	Heartleaf twayblade	Forb			S1		S2
Listera smallii	Appalachian twayblade	Forb		S1	S1		S2
Lithospermum canescens	Hoary puccoon	Forb			S2
Lithospermum caroliniense	Hispid gromwell	Forb			S1	S1
Lithospermum latifolium	American gromwell	Forb		S1
Litsea aestivalis	Pondspice	Forb		S1		S1
Lobelia canbyi	Canby's lobelia	Forb	S2	S1
Lobelia dortmanna	Water lobelia	Forb			S2
Lobelia elongata	Southern blue lobelia	Forb	S1.1	S3		S1
Lobelia kalmii	Brook lobelia	Forb			S1		S1
Lobelia puberula	Downy lobelia	Forb			S1
Lobelia spicata (var. spicata)	Pale-spike lobelia	Forb	S2
Lonicera canadensis	Canada honeysuckle	Shrub		S1			S2
Lonicera hirsuta	Hairy honeysuckle	Vine			S1
Lonicera oblongifolia	Swamp Fly honeysuckle	Shrub			S1
Lonicera villosa	Mountain Fly honeysuckle	Shrub			S1
Lotus helleri	Carolina prairie-trefoil	Forb				S1
Ludwigia alata	Winged seedbox	Forb				S1
Ludwigia brevipes	Long beach seedbox	Forb				S2
Ludwigia decurrens	Upright primrose-willow	Forb		S2S3	S1
Ludwigia glandulosa	Cylindric-fruited seedbox	Forb		S1
Ludwigia hirtella	Hairy seedbox	Forb	S1	S1		S1
Ludwigia leptocarpa	River seedbox	Forb					S2
Ludwigia linearis (var. linearis)	Narrow-leaf seedbox	Forb	S3
Ludwigia pilosa	Hairy seedbox	Forb				S1
Ludwigia polycarpa	False loosestrife seedbox	Forb			S1		S1
Ludwigia ravenii	Raven’s seedbox	Forb				S1
Ludwigia repens	Creeping seedbox	Forb				S1
Lupinus perennis ssp. perennis	Sundial lupine	Forb	S1	S2	S3		S1
Luzula acuminata (var. acuminata)	Northern hairy woodrush	Graminoid	S1
Luzula acuminata var. carolinae	Southern hairy woodrush	Graminoid	S1
Luzula bulbosa	Southern wood-rush	Graminoid			S1		S1
Lycopodiella alopecuroides	Foxtail clubmoss	Bryophyte	S3		S1
Lycopodiella appressa	Southern bog clubmoss	Bryophyte	S3		S2
Lycopodiella caroliniana	Carolina clubmoss	Bryophyte		S1
Lycopodiella inundata	Bog clubmoss	Bryophyte		S2		S1	S2
Lycopodiella margueritae	Clubmoss	Bryophyte			S1
Lycopodiella x copelandii	Clubmoss	Bryophyte			S1
Lycopodium clavatum	Staghorn clubmoss	Bryophyte	S3
Lycopodium lagopus	One-cone ground-pine	Bryophyte					S1
Lycopodium tristachyum	Ground-cedar	Bryophyte		S3
Lycopus amplectens	Sessile-leaved water-horehound	Forb	S2	S1
Lycopus rubellus	Bugleweed	Forb			S1
Lygodium palmatum	Climbing fern	Cryptogam	S1.1	S2			S3
Lyonia mariana	Stagger-bush	Shrub	S2		S1
Lysimachia hybrida	Lance-leaf loosestrife	Forb	S2	S2	S1	S2	S1
Lysimachia lanceolata	Lance-leaved loosestrife	Forb		S3
Lysimachia quadriflora	Four-flowered loosestrife	Forb				S1	S1
Lysimachia thyrsiflora	Tufted loosestrife	Forb		S1			S1
Lythrum alatum (var. alatum)	Winged loosestrife	Forb		S1	S1	S2	S2
Magnolia macrophylla	Bigleaf magnolia	Tree				S1
Magnolia tripetala	Umbrella magnolia	Tree		S3	S2
Magnolia virginiana	Sweet bay magnolia	Tree			S2
Maianthemum stellatum	Starflower false solomon's-seal	Forb					S2
Malaxis bayardii	Bayard's malaxis	Forb			S1
Malaxis monophyllos var. brachypoda	White adder's-mouth	Forb			S1
Malaxis unifolia	Green adder's-mouth	Forb	S1
Malus angustifolia	Narrow-leaved wild crab	Tree		S3
Malvastrum hispidum	Hispid falsemallow	Forb				S1
Manfreda virginica	False aloe	Subshrub				S2	S1
Marshallia grandiflora	Large-flowered marshallia	Forb			S1		S2
Marshallia obovata	Obovate marshallia	Forb				S2
Matelea carolinensis	Anglepod	Forb	S2	S1
Matelea decipiens	Old-field milkvine	Vine				S1
Matelea obliqua	Climbing milkweed	Vine		S1	S1
Matteuccia struthiopteris	Ostrich fern	Cryptogam		S2			S2
Matteuccia struthiopteris var. pensylvanica	Ostrich fern	Cryptogam				S1
Mecardonia acuminata (var. acuminata)	Purple mecardonia	#N/A	S3	S1
Meehania cordata	Heartleaf meehania	#N/A			S1
Megalodonta beckii	Beck's water-marigold	Forb			S1
Melanthium latifolium	Broad-leaved bunchflower	Forb		S1
Melanthium virginicum	Virginia bunchflower	Forb		S3
Melica mutica	Two-flowered melic grass	Graminoid		S1			S2
Melica nitens	Three-flower melic grass	Graminoid		S2	S2	S1S2	S1
Melothria pendula	Creeping cucumber	#N/A		S1			S1
Menyanthes trifoliata	Buckbean	#N/A		S1		S1	S1
Menziesia pilosa	Minniebush	#N/A			S3
Mertensia virginica	Virginia bluebells	Forb	S3
Micranthemum umbrosum	Shade mudflower	Forb				S1
Micranthes pensylvanica	Swamp saxifrage	Forb	S1.1
Micranthes virginiensis	Virginia saxifrage	Forb	S3
Milium effusum	Millet grass	Graminoid		S3
Mimosa quadrivalvis var. angustata	Little-leaf sensitivebriar	#N/A				S2
Mimulus moschatus	Muskflower	Forb				S1
Minuartia caroliniana	Carolina sandwort	Forb	S1.1	S1
Minuartia glabra	Mountain sandwort	Forb		S1	S2
Minuartia groenlandica	Mountain sandwort	Forb				S1	S1
Minuartia michauxii	Rock sandwort	Forb		S2
Mitella diphylla	two-leaf Bishop's-cap	Forb	S2
Mitella nuda	Naked Bishop's-cap	Forb			S1
Mitreola petiolata	Lax hornpod	Forb				S1
Mitreola sessilifolia	Sessile-leaved hornpod	Forb				S1
Moehringia lateriflora	Grove sandwort	Forb		S1		S1
Monarda clinopodia	Basil beebalm	Forb	S2	S3
Monarda fistulosa ssp. brevis	Smoke hole bergamot	Forb					S1
Monarda fistulosa (var. fistulosa)	Wild bergamot beebalm	Forb	S1.1
Monotropsis odorata	Sweet pinesap	#N/A		S1			S1
Montia chamissoi	Chamisso's miner's-lettuce	Forb			S1
Morella caroliniensis	Evergreen bayberry	Shrub	S2	S1
Morus rubra	Red mulberry	Tree	S3
Muhlenbergia bushii	Bush’s muhly	Graminoid				S1
Muhlenbergia capillaris (var. capillaris)	Long-awn hairgrass	Graminoid		S1			S1
Muhlenbergia cuspidata	Plains muhly	Graminoid				S2
Muhlenbergia glomerata	Marsh muhly	Graminoid				S2
Muhlenbergia sobolifera	Cliff muhly	Graminoid	S2
Muhlenbergia sylvatica	Woodland dropseed	Graminoid		S3
Muhlenbergia tenuiflora	Slender muhly	Graminoid	S2
Muhlenbergia torreyana	Torrey's dropseed	Graminoid		S1
Muhlenbergia uniflora	Fall dropseed muhly	Graminoid			S2
Myosotis laxa (subsp. laxa)	Small forget-me-not	Forb	S3
Myosotis macrosperma	Large-seed forget-me-not	Forb	S1	S2S3			S2
Myosotis verna	Spring forget-me-not	Forb		S3
Myrica cerifera var. pumila	Dwarf southern bayberry	Shrub				S1
Myrica gale	Sweet-gale	Shrub			S2
Myriophyllum farwellii	Farwell's water-milfoil	Forb			S3
Myriophyllum heterophyllum	Broadleaf water-milfoil	Forb		S1
Myriophyllum humile	Low water-milfoil	Forb	S3			S1
Myriophyllum laxum	Loose water-milfoil	Forb				S1
Myriophyllum pinnatum	Cutleaf water-milfoil	Forb	S2				S1
Myriophyllum sibiricum	Northern water-milfoil	Forb			S1
Myriophyllum tenellum	Slender water-milfoil	Forb			S2	S1
Myriophyllum verticillatum	Whorled water-milfoil	Forb			S1
Najas flexilis	Slender naiad	Forb		S3
Najas gracillima	thread-like naiad	Forb	S1				S2
Najas guadalupensis	Southern naiad	Forb		S3
Napaea dioica	Glade mallow	Forb		S1
Nelumbo lutea	American lotus	Forb	S1.1	S2
Nemopanthus mucronatus	Mountain holly	Shrub		S3
Nemophila aphylla	Small-flowered baby-blue-eyes	Forb		S1
Nestronia umbellula	Nestronia	Forb				S1
Nuphar microphylla	Yellow cowlily	Forb			S1
Nuphar sagittifolia	Narrow-leaved spatterdock	Forb				S1
Nuttallanthus canadensis	Old-field toadflax	Forb					S2
Nymphoides aquatica	Larger floating-heart	Forb		S1		S1
Nymphoides cordata	little floating-heart	Forb	S1	S1	S2
Obolaria virginica	Virginia pennywort	Forb	S3
Oclemena nemoralis	Bog aster	Forb			S1
Oenothera argillicola	Shale-barren evening-primrose	Forb		S3	S2		S3
Oenothera fruticosa (var. fruticosa)	Narrow-leaf evening-primrose	Forb	S2
Oenothera humifusa	Sea-beach evening-primrose	Forb	S3
Oenothera oakesiana	Evening-primrose	Forb			S2
Oenothera pilosella ssp. pilosella	Evening-primrose	Forb					S2
Oenothera tetragona (var. tetragona)	Shrubby evening-primrose	Forb	S2
Oldenlandia boscii	Bosc’s bluets	Forb				S1
Oldenlandia uniflora	Clustered bluets	Forb		S3	S1
Oligoneuron rigidum var. glabratum	Southeastern stiff goldenrod	Forb				S1
Oligoneuron rigidum (var. rigidum)	Stiff goldenrod	Forb				S2
Onosmodium molle	Shaggy false-gromwell	Forb		S1
Onosmodium molle var. hispidissimum	False gromwell	Forb			S1
Onosmodium virginianum	Virginia false-gromwell	Forb		S1		S2
Ophioglossum engelmannii	Limestone Adder's-tongue	Cryptogam			S1		S1
Ophioglossum petiolatum	Longstem adder’s-tongue	Cryptogam				S1
Ophioglossum pusillum	Northern adder’s tongue	Cryptogam				S1
Ophioglossum vulgatum	Southern adder's-tongue	Cryptogam	S3
Opuntia humifusa	Prickly-pear cactus	Forb			S3
Orbexilum onobrychis	Lanceleaf scurfpea	Forb				S1
Orobanche uniflora	One-flowered broomrape	Forb	S3
Oryzopsis asperifolia	White-grained mountain-ricegrass	Graminoid		S2		S1	S1
Oryzopsis pungens	Slender mountain-ricegrass	Graminoid			S2
Osmanthus americanus	Wild olive	#N/A				S1
Osmunda cinnamomea var. glandulosa	Glandular cinnamon fern	Cryptogam				S1
Ostrya virginiana	Eastern hop-hornbeam	Tree	S2
Oxydendrum arboreum	Sourwood	Tree		S1	S3S4
Oxypolis canbyi	Canby's dropwort	Forb		S1
Oxypolis rigidior	Stiff cowbane	Forb			S2
Packera anonyma	Small's ragwort	Forb	S1.1		S2
Packera antennariifolia	Cat's-paw ragwort	Forb		S3	S1		S3
Packera millefolium	Yarrow-leaved ragwort	Forb				S2
Packera paupercula (var. paupercula)	Balsam ragwort	Forb	S1	S3			S2
Packera plattensis	Prairie ragwort	Forb					S1
Panax quinquefolius	American ginseng	Forb	S2	S3
Panicum commonsianum var. euchlamydeum	Cloaked panic grass	Graminoid			S2
Panicum flexile	Wiry witch grass	Graminoid		S1	S2S3
Panicum hemitomon	Maidencane panic grass	Graminoid	S2	S3		S2
Panicum longifolium	Long-leaf panic grass	Graminoid			S1
Panicum philadelphicum	Philadelphia panic grass	Graminoid	S1.1
Panicum tuckermanii	Tuckerman's panic grass	Graminoid			S2
Panicum verrucosum	Warty panic grass	Graminoid					S1
Panicum xanthophysum	Slender panic grass	Graminoid			S1
Parnassia asarifolia	Kidneyleaf grass-of-parnassus	Forb		S1			S2
Parnassia glauca	Carolina grass-of-parnassus	Forb			S2
Parnassia grandifolia	Largeleaf grass-of-parnassus	Forb				S2	S1
Paronychia argyrocoma	Silver nailwort	Forb					S3
Paronychia canadensis	Forked nailwort	Forb	S3
Paronychia fastigiata (var. fastigiata)	Cluster-stemmed nailwort	Forb	S2
Paronychia fastigiata var. nuttallii	Forked-chickweed	Forb			S1S2
Paronychia fastigiata var. paleacea	Cluster-stemmed nailwort	Forb	S2
Paronychia virginica (var. virginica)	Yellow nailwort	Forb		S1		S1	S2
Parthenium integrifolium	American feverfew	Forb		S1	S1
Paspalum dissectum	Walter's paspalum	Graminoid	S3	S2		S2
Paspalum distichum	Joint paspalum	Graminoid				S2
Paspalum fluitans	Floating paspalum	Graminoid		S1
Paspalum praecox	Early paspalum	Graminoid				S1
Paspalum pubiflorum	Hairy-seed paspalum	Graminoid					S1
Paspalum setaceum (var. setaceum)	slender paspalum	Graminoid	S3
Passiflora lutea	Passion-flower	Vine			S2
Paxistima canbyi	Canby's mountain lover	#N/A		S1	S1	S2	S2
Pedicularis canadensis	Early wood lousewort	Forb	S2
Pedicularis lanceolata	Swamp lousewort	Forb		S1	S1S2		S2
Pediomelum canescens	Hoary scurfpea	Forb				S1
Pellaea glabella (ssp. glabella)	Smooth cliffbrake	Cryptogam		S1			S2
Peltandra virginica	Arrow-arum	Forb					S2
Penstemon australis	Southern beard-tongue	Forb				S2
Penstemon calycosus	Long-sepal beard-tongue	Forb				S1
Penstemon canescens	Beard-tongue	Forb			S3
Penstemon laevigatus	Smooth beardtongue	Forb	S1	S3	S3
Persea palustris	Red bay	Shrub		S1
Persicaria setacea	Bog smartweed	Forb			S2
Phacelia covillei	Blue scorpion-weed	Forb		S2		S1	S1
Phacelia fimbriata	Fringed scorpionweed	Forb				S2
Phacelia purshii	Miami-mist	Forb		S3
Phanopyrum gymnocarpon	Clustered panic grass	Graminoid				S1
Phaseolus polystachios	Wild kidney bean	#N/A		S3	S1S2
Phegopteris connectilis	Northern beech fern	Cryptogam		S2
Phemeranthus teretifolius	Round-leaved fame-flower	Forb			S2
Phlox amplifolia	Large-leaved phlox	Forb				S2
Phlox buckleyi	Swordleaf phlox	Forb				S2	S2
Phlox glaberrima	Smooth phlox	Forb		S1
Phlox ovata	Mountain phlox	Forb			S1
Phlox pilosa	Downy phlox	Forb		S1	S1S2	S2
Phlox subulata ssp. brittonii	Moss pink	Forb			S1
Photinia floribunda	Purple chokeberry	Shrub		S3
Phragmites australis subsp. americanus	North American reed	Graminoid	S2		S1
Phyla lanceolata	Fog-fruit	Forb	S2
Phyla nodiflora	Common frog-fruit	Forb				S1
Phyllanthus caroliniensis	Carolina leaf-flower	Forb		S3	S1
Physalis virginiana	Virginia ground-cherry	Forb		S3	S1S2
Physalis walteri	Dune ground-cherry	Forb				S2
Picea rubens	Red spruce	Tree		S3
Pieris floribunda	Mountain fetter-bush	Shrub					S2
Pilea fontana	Coolwort	Forb		S3
Pinus echinata	Short-leaf pine	Tree	S3		S1S2
Pinus palustris	Long-leaf pine	Tree				S1
Pinus resinosa	Red pine	Tree					S1
Pinus rigida	pitch pine	Tree	S3
Piptatherum canadense	Canada mountain-ricegrass	Graminoid					S1
Piptatherum racemosum	Black-fruited mountainrice	Graminoid		S2			S2
Piptochaetium avenaceum	Blackseed needlegrass	Graminoid	S3		S1		S2
Pityopsis graminifolia	Grass-leaved golden-aster	Forb				S1
Plantago maritima var. juncoides	Seaside plantain	Forb				S1
Platanthera aquilonis	Northern green orchid	Forb			S1
Platanthera blephariglottis	White-fringe orchis	Forb	S1	S2	S2S3	S1
Platanthera ciliaris	Yellow fringed orchid	Forb		S2	S2		S3
Platanthera cristata	Yellow-crested orchis	Forb	S2	S3
Platanthera dilatata	Leafy white orchid	Forb			S1
Platanthera flava	Pale green orchid	Forb		S2
Platanthera flava var. herbiola	Southern rein orchid	Forb	S1
Platanthera grandiflora	Large purple fringed orchid	Forb		S2		S1
Platanthera hookeri	Hooker's orchid	Forb			S1
Platanthera huronensis	Huron green orchid	Forb			S1
Platanthera lacera	Green-fringe orchis	Forb	S3
Platanthera leucophaea	Prairie fringed orchid	Forb				S1
Platanthera peramoena	Purple fringeless orchid	Forb	S1	S1	S2	S2
Platanthera psycodes	Small purple-fringe orchid	Forb					S1
Platanthera shriveri	Shriver's frilly orchid	Forb				S1
Pleopeltis polypodioides	Resurrection fern	Cryptogam		S3
Pluchea camphorata	Marsh fleabane	Forb		S1
Pluchea foetida (var. foetida)	Stinking camphorweed	Forb	S3
Pluchea odorata	Shrubby camphorweed	Forb			S1
Poa alsodes	Grove meadowgrass	Graminoid		S2
Poa autumnalis	Autumn bluegrass	Graminoid	S3		S1
Poa cuspidata	Early bluegrass	Graminoid	S2
Poa languida	Drooping bluegrass	Graminoid			S2
Poa paludigena	Bog bluegrass	Graminoid	S1.1		S3	S2	S1
Poa palustris	Fowl bluegrass	Graminoid				S1S2
Poa saltuensis	Drooping bluegrass	Graminoid		S1		S2	S1
Podostemum ceratophyllum	Threadfoot	Forb	S1	S3
Pogonia ophioglossoides	Rose pogonia	Forb	S2	S3			S2
Polanisia dodecandra (ssp. dodecandra)	Common clammyweed	Forb		S1		S2
Polemonium reptans (var. reptans)	Greek valerian	Forb	S3
Polemonium vanbruntiae	Jacob's-ladder	Forb		S2	S1		S2
Polygala cruciata	Cross-leaved milkwort	Forb		S2	S1
Polygala cruciata var. aquilonia	Crossleaf milkwort	Forb	S2				S1
Polygala curtissii	Curtis's milkwort	Forb			S1		S2
Polygala incarnata	Pink milkwort	Forb	S1	S2S3
Polygala nuttallii	Nuttall's milkwort	Forb			S3
Polygala polygama	Racemed milkwort	Forb		S1	S1S2
Polygala senega	Seneca snakeroot	Forb		S2
Polygonatum biflorum var. commutatum	Giant Solomon's-seal	Forb	S3
Polygonella articulata	Eastern Jointweed	Forb			S1
Polygonella polygama	October-flower	Forb				S1
Polygonum amphibium var. emersum	Water smartweed	Forb					S2S3
Polygonum amphibium var. stipulaceum	Water smartweed	Forb					S1
Polygonum careyi	Carey's smartweed	Forb			S1
Polygonum cilinode	Fringed bindweed	Forb		S3
Polygonum glaucum	Seabeach knotweed	Forb	S1	S1		S1S2
Polygonum ramosissimum	Bushy knotweed	Forb	S2
Polypodium virginianum	Virginia polypody	Cryptogam	S3
Polystichum braunii	Braun's holly fern	Cryptogam			S1
Populus balsamifera (ssp. balsamifera)	Balsam poplar	Tree			S1		S1
Populus tremuloides	Quaking aspen	Tree				S2
Porteranthus stipulatus	American ipecac	Forb				S1
Portulaca smallii	Small’s purslane	Forb				S1
Potamogeton amplifolius	Large-leaf pondweed	Forb				S1S2
Potamogeton confervoides	Tuckerman's pondweed	Forb			S2
Potamogeton foliosus	Leafy pondweed	Forb		S1
Potamogeton friesii	Fries' pondweed	Forb			S1
Potamogeton gramineus	Grassy pondweed	Forb			S1
Potamogeton hillii	Hill's pondweed	Forb			S1	S1
Potamogeton illinoensis	Illinois pondweed	Forb		S1			S2
Potamogeton natans	Floating pondweed	Forb	S1
Potamogeton oakesianus	Oakes' pondweed	Forb			S1S2	S2
Potamogeton obtusifolius	Blunt-leaved pondweed	Forb			S1
Potamogeton perfoliatus	Clasping-leaved pondweed	Forb		S2
Potamogeton praelongus	White-stemmed pondweed	Forb			S1
Potamogeton pulcher	Spotted pondweed	Forb			S1		S1
Potamogeton pusillus	Slender pondweed	Forb		S1
Potamogeton pusillus var. tenuissimus	Slender pondweed	Forb					S1
Potamogeton richardsonii	Red-head pondweed	Forb			S3
Potamogeton spirillus	Spiral pondweed	Forb		S1		S1	S2
Potamogeton strictifolius	Straight-leaf pondweed	Forb				S1
Potamogeton tennesseensis	Tennessee pondweed	Forb			S1	S1	S2
Potamogeton vaseyi	Vasey's pondweed	Forb			S1
Potamogeton zosteriformis	Flatstem pondweed	Forb		S1	S2S3	S1
Potentilla anserina	Silverweed	Forb			S3
Potentilla arguta	Tall cinquefoil	Forb				S1
Potentilla fruticosa	Shrubby cinquefoil	Forb			S1
Potentilla paradoxa	Bushy cinquefoil	Forb			S1
Potentilla tridentata	Three-toothed cinquefoil	Forb			S1
Prenanthes autumnalis	Slender rattlesnake-root	Forb		S1		S2
Prenanthes crepidinea	Nodding rattlesnake-root	Forb					S1
Prenanthes serpentaria	Lion's-foot	Forb			S3
Prosartes maculata	Nodding mandarin	Forb					S1
Prunus alleghaniensis (var. alleghaniensis)	Alleghany plum	Tree		S2	S2S3		S3
Prunus angustifolia (var. angustifolia)	Chickasaw plum	Tree					S1
Prunus maritima	Beach plum	Tree	S3	S1	S1	S1
Prunus nigra	Canada plum	Tree				S1
Prunus pumila var. depressa	Dwarf sand cherry	Tree			S1		S1
Prunus pumila var. susquehanae	Susquehanna cherry	Tree			S2	S1
Pseudognaphalium helleri	Catfoot	Forb				S1
Pseudognaphalium macounii	Winged cudweed	Forb				S1
Ptelea trifoliata	Common hop-tree	Tree		S3	S2
Ptilimnium fluviatile	Harperella	Forb					S1
Ptilimnium nodosum	Harperella	Forb		S1		S1
Puccinellia fasciculata	Salt marsh goosegrass	Graminoid				S1
Pycnanthemum beadlei	Beadle's mountain mint	Forb					S1
Pycnanthemum clinopodioides	Basil mountain-mint	Forb				S1
Pycnanthemum incanum (var. incanum)	Hoary mountain-mint	Forb	S1
Pycnanthemum loomisii	Loomis' mountain-mint	Forb					S2
Pycnanthemum montanum	Appalachian mountain-mint	Forb				S2
Pycnanthemum muticum	Blunt mountain-mint	Forb	S3				S1
Pycnanthemum setosum	Awned mountain-mint	Forb	S3			S1
Pycnanthemum torrei	Torrey's Mountain-mint	Forb	S1	S1	S1		S1
Pycnanthemum verticillatum (var. verticillatum)	Whorled mountain-mint	Forb	S3	S1
Pycnanthemum virginianum	Virginia mountain-mint	Forb		S2
Pyrola americana	Round-leaf shinleaf	Forb	S2
Pyrola chlorantha		Forb			S1
Pyrola elliptica	Elliptic shinleaf	Forb	S2			S2
Pyrularia pubera	Buffalo nut	Forb			S3
Pyxidanthera barbulata	Flowering pixiemoss	Forb				S1
Quercus falcata	Southern red oak	Tree			S1
Quercus hemisphaerica	Darlington’s oak	Tree				S1
Quercus incana	Bluejack oak	Tree				S2
Quercus lyrata	Overcup oak	Tree	S2
Quercus macrocarpa	Mossy-cup oak	Tree		S1		S1
Quercus marilandica (var. marilandica)	Blackjack oak	Tree	S3
Quercus michauxii	Swamp chestnut oak	Tree			S1
Quercus phellos	Willow oak	Tree			S2
Quercus prinoides	Dwarf chinquapin oak	Tree	S1	S3		S1
Quercus shumardii	Shumard's oak	Tree		S2	S2		S2
Ranunculus allegheniensis	Mountain crowfoot	Forb		S3
Ranunculus ambigens	Water-plantain buttercup	Forb	S1.1		S3	S1
Ranunculus aquatilis var. diffusus	White water-crowfoot	Forb			S3	S1
Ranunculus caricetorum	Hispid buttercup	Forb	S1
Ranunculus fascicularis	Early buttercup	Forb		S1	S1S2
Ranunculus flabellaris	Yellow water-crowfoot	Forb	S1.1	S1	S2
Ranunculus flammula var. filiformis	Creeping spearwort	Forb					S1
Ranunculus hederaceus	Long-stalked crowfoot	Forb		S1	S1
Ranunculus hispidus	Bristly buttercup	Forb	S1.1
Ranunculus laxicaulis	Mississippi buttercup	Forb				S1
Ranunculus macounii	Macoun buttercup	Forb					S1
Ranunculus pensylvanicus	Bristly crowfoot	Forb					S1
Ranunculus pusillus (var. pusillus)	Low spearwort	Forb	S3		S1		S1
Ranunculus sceleratus (var. sceleratus)	Crused crowfoot	Forb					S2
Ranunculus septentrionalis	Shining hispid buttercup	Forb	S1.1
Ranunculus trichophyllus	White water-crowfoot	Forb		S1
Ratibida pinnata	Gray-headed prairie coneflower	Forb			S1
Rhamnus alnifolia	Alder-leaved buckthorn	Tree				S1	S1S2
Rhamnus lanceolata	Lance-leaved buckthorn	Tree			S1
Rhamnus lanceolata var. glabrata	Smooth lanceleaved buckthorn	Tree				S1
Rhamnus lanceolata (ssp. lanceolata)	Lance-leaved buckthorn	Tree					S1
Rhexia aristosa	Awned meadow beauty	Forb	S1
Rhexia mariana (var. mariana)	Maryland meadow beauty	Forb			S1		S1
Rhexia petiolata	Ciliate meadow beauty	Forb				S1
Rhododendron arborescens	Smooth azalea	Shrub		S3		S2
Rhododendron atlanticum	Dwarf azalea	Shrub	S3		S1
Rhododendron calendulaceum	Flame azalea	Shrub		S1
Rhododendron viscosum	Swamp azalea	Shrub					S1
Rhus michauxii	Michaux’s sumac	Tree				S1
Rhynchosia tomentosa	Hairy snoutbean	Forb	S1	S2
Rhynchospora alba	White beakrush	Graminoid	S2	S3		S2
Rhynchospora capillacea	Capillary beaked-rush	Graminoid			S1	S1
Rhynchospora cephalantha var. attenuata	Small capitate beakrush	Graminoid				S2
Rhynchospora cephalantha (var. cephalantha)	Capitate beakrush	Graminoid	S2	S1
Rhynchospora colorata	White-topped sedge	Graminoid				S1
Rhynchospora corniculata	Short-bristle beakrush	Graminoid	S2
Rhynchospora debilis	Savannah beakrush	Graminoid				S1
Rhynchospora fascicularis	Fasciculate beakrush	Graminoid				S2
Rhynchospora filifolia	Thread-leaved beakrush	Graminoid	S1.1
Rhynchospora fusca	Brown beakrush	Graminoid	S2				S1
Rhynchospora globularis	Grass-like beakrush	Graminoid		S1
Rhynchospora glomerata	Clustered beakrush	Graminoid	S2	S3
Rhynchospora harperi	Harper's beakrush	Graminoid	S1	S1
Rhynchospora harveyi	Harvey’s beakrush	Graminoid				S1
Rhynchospora inundata	Drowned beakrush	Graminoid	S1	S1
Rhynchospora macrostachya (var. macrostachya)	Tall horned rush	Graminoid				S2
Rhynchospora microcephala	Tiny-headed beakrush	Graminoid	S2	S2
Rhynchospora nitens	Short-beaked beakrush	Graminoid	S1	S1		S1
Rhynchospora oligantha	Few-flowered beakrush	Graminoid				S1
Rhynchospora rariflora	Few-flowered beakrush	Graminoid	S1.1
Rhynchospora recognita	Tall horned rush	Graminoid	S2	S2	S1		S2
Rhynchospora scirpoides	Long-beaked beakrush	Graminoid	S2	S2		S1
Rhynchospora stenophylla	Coastal bog beaksedge	Graminoid				S1
Rhynchospora torreyana	Torrey's beakrush	Graminoid	S2	S2
Rhynchospora wrightiana	Wright’s beakrush	Graminoid				S1
Ribes americanum	Wild black currant	Shrub				S1
Ribes cynosbati	Prickly gooseberry	Shrub		S3
Ribes glandulosum	Skunk currant	Shrub		S3
Ribes hirtellum	Low wild gooseberry	Shrub		S1			S1
Ribes lacustre	Swamp currant	Shrub			S1		S2
Ribes missouriense	Missouri gooseberry	Shrub			S1		S1
Ribes triste	Swamp red currant	Shrub			S2		S1
Rorippa sessiliflora	Stalkless yellowcress	Forb				S1	S1
Rosa acicularis ssp. sayi	Prickly rose	Shrub					S1
Rosa blanda	Smooth rose	Shrub		S1			S2
Rosa carolina	Carolina rose	Shrub	S3
Rosa setigera	Prairie rose	Shrub			S1	S1
Rosa virginiana	Virginia rose	Shrub			S1
Rotala ramosior	Tooth-cup	Forb			S3
Rubus cuneifolius	Sand blackberry	Shrub			S1
Rubus idaeus ssp. strigosus	Red raspberry	Shrub				S2
Rubus odoratus	Purple-flowering raspberry	Shrub	S1
Rubus pubescens (var. pubescens)	Dwarf red raspberry	Shrub					S1
Rudbeckia fulgida	Orange coneflower	Forb		S3	S3		S2
Rudbeckia heliopsidis	Sun-facing coneflower	Forb				S1
Rudbeckia triloba	Thin-leaved coneflower	Forb		S3
Rudbeckia triloba var. pinnatiloba	Pinnate-lobed coneflower	Forb				S1
Ruellia caroliniensis	Carolina wild petunia	Forb	S3
Ruellia humilis	Hairy wild-petunia	Forb		S1	S1		S1
Ruellia pedunculata	Stalked wild-petunia	Forb			S1
Ruellia purshiana	Pursh's ruellia	Forb		S1
Ruellia strepens	Rustling wild-petunia	Forb		S1	S2
Rumex altissimus	Tall dock	Forb	S1	S1
Sabatia angularis	Square-stemmed rose pink	Forb	S3
Sabatia campanulata	Slender marsh pink	Forb	S1	S1		S2
Sabatia difformis	Two-formed pink	Forb	S1	S1		S1
Sabatia dodecandra	Large marsh pink	Forb	S1	S3
Sabatia stellaris	Sea pink	Forb	S3
Saccharum baldwinii	Narrow plumegrass	Graminoid		S1
Saccharum brevibarbe var. contortum	Bent-awn plumegrass	Graminoid	S2
Saccharum coarctatum	Bunched plumegrass	Graminoid	S2
Saccharum contortum	Bent-awn plumegrass	Graminoid		S3S4
Sacciolepis striata	Gibbous grass	Graminoid	S1	S1
Sagittaria calycina var. spongiosa	Arrowhead	Forb			S1	S1
Sagittaria calycina (var. calycina)	Long-lobe arrowhead	Forb	S3	S2		S1	S2
Sagittaria cuneata	Wapatum arrowhead	Forb			S1
Sagittaria engelmanniana	Engelmann's arrowhead	Forb	S2	S2
Sagittaria graminea	Grassleaf arrowhead	Forb	S2
Sagittaria lancifolia var. media	Bull-tongue arrowhead	Forb	S1.1
Sagittaria latifolia var. pubescens	Hairy arrowhead	Forb	S3
Sagittaria rigida	Sessile-fruited arrowhead	Forb		S1		S1
Sagittaria spatulata	Tidal arrowhead	Forb	S1
Sagittaria subulata	Strap-leaf arrowhead	Forb	S2		S3
Salicornia bigelovii	Dwarf glasswort	Forb	S1
Salix amygdaloides	Peach-leaved willow	Tree					S1
Salix candida	Hoary willow	Shrub			S1
Salix caroliniana	Carolina willow	Tree		S3	S1
Salix discolor	Glaucous willow	Tree				S1	S2
Salix exigua	Sandbar willow	Tree		S1		S1
Salix humilis var. tristis	Dwarf Prairie willow	Shrub		S1
Salix lucida (ssp. lucida)	Shining willow	Tree					S1
Salix myricoides	Broad-leaved willow	Tree			S2
Salix pedicellaris	Bog willow	Shrub			S1
Salix sericea	Silky willow	Tree	S1
Salix serissima	Autumn willow	Tree			S2
Samolus parviflorus	Pineland pimpernel	Forb			S3
Samolus valerandi ssp. parviflorus	Water pimpernel	Forb					S2
Sanguisorba canadensis	Canada burnet	Forb		S2		S2	S2S3
Sanicula marilandica	Maryland black snakeroot	Forb	S1.1	S3
Sanicula trifoliata	Large-fruited snakeroot	Forb	S1.1	S3
Sarcocornia pacifica	Perennial glasswort	Forb	S3
Sarracenia flava	Yellow pitcher-plant	Forb				S1
Sarracenia purpurea var. venosa	Southern purple pitcher-plant	Forb				S2
Sarracenia purpurea (var. purpurea)	Northern purple pitcherplant	Forb	S2	S2
Saxifraga careyana	Carey saxifrage	Forb					S3
Saxifraga caroliniana	Carolina saxifrage	Forb					S1
Saxifraga michauxii	Michaux saxifrage	Forb					S1
Saxifraga micranthidifolia	Lettuce-leaved saxifrage	Forb		S3
Saxifraga pensylvanica	Swamp saxifrage	Forb					S2
Scheuchzeria palustris	Pod-grass	Graminoid			S1
Schizachne purpurascens	Purple oat	Graminoid		S1		S1	S1
Schizachyrium littorale	Seaside bluestem	Graminoid	S3
Schizachyrium scoparium var. littorale	Seaside bluestem	Graminoid			S3
Schizaea pusilla	Curly-grass fern	Cryptogam	S1.1
Schoenoplectus acutus (var. acutus)	Hard-stemmed bulrush	Graminoid			S2	S1	S2
Schoenoplectus etuberculatus	Canby's bulrush	Graminoid	S1	S1
Schoenoplectus fluviatilis	River bulrush	Graminoid			S3	S2
Schoenoplectus novae-angliae	Salt-marsh bulrush	Graminoid		S2
Schoenoplectus purshianus (var. purshianus)	Bristled weakstalk bulrush	Graminoid	S2				S3
Schoenoplectus purshianus var. williamsii	Bristleless weakstalk bulrush	Graminoid	S2
Schoenoplectus smithii	Smith's bulrush	Graminoid			S1
Schoenoplectus smithii var. setosus	Smith's bristled bulrush	Graminoid	S1.1
Schoenoplectus subterminalis	Water clubrush	Graminoid	S2	S1	S3	S1S2
Schoenoplectus torreyi	Torrey's bulrush	Graminoid			S1	S1
Scirpus ancistrochaetus	Northeastern bulrush	Graminoid		S1	S3	S2	S1
Scirpus atrocinctus	Black-girdle bulrush	Graminoid					S3
Scirpus atrovirens	Bulrush	Graminoid	S1
Scirpus expansus	Red-stem bulrush	Graminoid	S2	S3
Scirpus flaccidifolius	Schuyler reclining bulrush	Graminoid				S1
Scirpus microcarpus	Small-fruit bulrush	Graminoid					S3
Scirpus pedicellatus	Stalked bulrush	Graminoid			S1
Scirpus pendulus	Pendulous bulrush	Graminoid	S2	S3
Scleria ciliata (var. ciliata)	Fringed nutrush	Graminoid				S1
Scleria minor	Slender nutrush	Graminoid		S1		S2
Scleria muehlenbergii	Muhlenberg's nutrush	Graminoid	S1	S1S2	S1
Scleria nitida	Shining nutrush	Graminoid		S1
Scleria oligantha	Little-headed nutrush	Graminoid					S1
Scleria pauciflora var. caroliniana	Hairy few-flowered nutrush	Graminoid	S1			S1
Scleria pauciflora (var. pauciflora)	Smooth few-flowered nutrush	Graminoid	S1	S3	S2		S1
Scleria reticularis	Reticulated nutrush	Graminoid	S3	S2S3
Scleria triglomerata	Tall nutrush	Graminoid	S2	S1S2			S2
Scleria verticillata	Whorled nutrush	Graminoid		S1	S1	S2
Sclerolepis uniflora	One-flowered bog button	#N/A	S2	S2		S1
Scrophularia lanceolata	Hare figwort	Forb		S3
Scutellaria galericulata	Hooded skullcap	Forb	S1	S1		S1	S1
Scutellaria incana	Downy skullcap	Forb		S3		S2
Scutellaria leonardii	Leonard's skullcap	Forb		S2
Scutellaria nervosa	Veined skullcap	Forb		S1
Scutellaria ovata (ssp. ovata)	Heart-leaved skullcap	Forb		S3			S1
Scutellaria parvula (var. parvula)	Small skullcap	Forb				S1
Scutellaria saxatilis	Rock skullcap	Forb		S1	S1		S2
Scutellaria serrata	Showy skullcap	Forb		S3	S1
Sedum glaucophyllum	Cliff stonecrop	Forb		S1
Sedum rosea	Roseroot stonecrop	Forb			S1
Sedum telephioides	Allegheny stonecrop	Forb			S3
Sedum ternatum	Woodland stonecrop	Forb	S2
Selaginella apoda	Meadow spikemoss	Bryophyte	S3
Senna marilandica	Wild senna	Subshrub			S3
Sericocarpus linifolius	Narrow-leaved white-topped aster	Forb			S1		S1
Sesuvium maritimum	Sea-purslane	Forb		S1
Seymeria cassioides	Seymeria	#N/A				S1S2
Shepherdia canadensis	Canada buffalo-berry	#N/A			S1
Sibbaldiopsis tridentata	Three-toothed cinquefoil	Forb				S2	S2
Sida elliottii	Elliott sida	Forb				S1
Sida hermaphrodita	Virginia mallow	Forb		S1	S2	S1	S3
Sideroxylon lycioides	Buckthorn	#N/A	S1.1
Silene caroliniana ssp. wherryi	Wherry's catchfly	Forb					S1
Silene caroliniana var. pensylvanica	Northern wild pink	Forb	S1
Silene nivea	Snowy campion	Forb		S1		S1	S1
Silene ovata	Ovate catchfly	Forb				S1
Silene rotundifolia	Roundleaf catchfly	Forb				S2	S1
Silene virginica	Fire-pink	Forb	S1
Silene virginica var. robusta	Robust fire pink	Forb					S1
Silphium compositum var. reniforme	Kidney-leaf rosin-weed	Forb					S1
Silphium perfoliatum var. connatum	Virginia cup-plant	Forb					S1
Silphium terebinthinaceum	Prairie rosinweed	Forb				S1
Silphium trifoliatum	Three-leaved rosinweed	Forb		S3
Sisyrinchium albidum	White blue-eyedgrass	Forb				S2
Sisyrinchium atlanticum	Eastern blue-eyed Grass	Forb	S3		S1
Sisyrinchium fuscatum (arenicola)	Coastal Plain blue-eyed grass	Forb		S1
Sisyrinchium mucronatum	Michaux's blue-eyed-grass	Forb	S1.1
Smallanthus uvedalius	Yellow-flowered leafcup	Forb	S3		S3
Smilacina stellata	Star-flowered false Solomon's-seal	Forb		S1
Smilax bona-nox	Saw greenbrier	Vine	S1	S3
Smilax ecirrata	Upright greenbrier	Vine				S1
Smilax hispida	weak-prickle greenbrier	Vine	S1
Smilax pseudochina	long-stalk greenbrier	Vine	S2	S2
Smilax walteri	Walter's greenbrier	Vine	S3
Solidago arguta (var. arguta)	cutleaf goldenrod	Forb	S1
Solidago arguta var. harrisii	Harris' golden-rod	Forb		S3	S1		S3
Solidago curtisii	Curtis' goldenrod	Forb		S1	S1
Solidago erecta	Slender golden-rod	Forb			S1
Solidago faucibus	Gorge goldenrod	Forb					S1
Solidago gracillima	Southern bog goldenrod	Forb				S2
Solidago latissimifolia	Elliott's goldenrod	Forb	S1	S3		S2
Solidago patula var. strictula		Forb				S1
Solidago patula (var. patula)	Roundleaf goldenrod	Forb	S3	S3			S1
Solidago racemosa	Sticky goldenrod	Forb				S1
Solidago randii	Rand’s goldenrod	Forb				S2S3
Solidago rigida	Hard-leaved goldenrod	Forb			S1
Solidago roanensis	Tenessee golden-rod	Forb			S2
Solidago rupestris	Riverbank goldenrod	Forb				S1
Solidago simplex ssp. randii	Mountain goldenrod	Forb					S1
Solidago simplex ssp. randii var. racemosa	Sticky goldenrod	Forb			S1		S2
Solidago simplex var. racemosa	Riverbank goldenrod	Forb		S1
Solidago speciosa (var. speciosa)	Showy goldenrod	Forb		S2	S2
Solidago tarda	Late goldenrod	Forb	S1.1
Solidago tortifolia	Leafy pinewoods goldenrod	Forb				S1
Solidago uliginosa (var. uliginosa)	Bog goldenrod	Forb	S1.1	S3	S2	S2
Solidago ulmifolia (var. ulmifolia)	Elm-leaf goldenrod	Forb	S2
Sorbus americana	American mountain-ash	Tree		S3
Sorbus decora	Showy mountain-ash	Tree			S1
Sorghastrum elliottii	Long-bristled Indian-grass	Graminoid		S1
Sparganium androcladum	Branching bur-reed	Forb		S3	S1		S2S3
Sparganium angustifolium	Narrow-leaf bur-reed	Forb			S2		S1S2
Sparganium chlorocarpum	Narrow-leaf bur-reed	Forb				S1
Sparganium erectum	Green-fruited bur-reed	Forb		S3
Sparganium eurycarpum	Broad-fruited bur-reed	Forb		S3
Spartina pectinata	Fresh water cordgrass	Graminoid	S1.1			S2
Spermacoce glabra	Buttonweed	#N/A		S1		S1	S1
Sphenopholis pensylvanica	Swamp wedgescale grass	Graminoid	S1	S2
Spiraea alba (var. alba)	Narrowleaf white spiraea	Shrub	S1
Spiraea alba var. latifolia	Broad-leaf white spiraea	Shrub	S1
Spiraea betulifolia	Dwarf spiraea	Shrub		S3	S1
Spiraea virginiana	Virginia spiraea	Shrub				S1	S1
Spiranthes casei	Case's ladies'-tresses	Forb			S1
Spiranthes lacera var. gracilis	Southern slender ladies'-tresses	Forb	S2
Spiranthes lacera (var. lacera)	Northern slender ladies'-tresses	Forb					S1
Spiranthes lucida	Wide-leaved ladies' tresses	Forb		S1	S3	S1	S1S2
Spiranthes magnicamporum	Great Plains ladies’-tresses	Forb				S1
Spiranthes ochroleuca	Yellow Nodding ladies' tresses	Forb		S1		S1
Spiranthes ovalis	October ladies'-tresses	Forb			S1
Spiranthes ovalis var. erostellata	Oval ladies'-tresses	Forb					S1
Spiranthes praecox	Grass-leaved ladies' tresses	Forb		S1
Spiranthes romanzoffiana	Hooded Ladies'-tresses	Forb			S1
Spiranthes tuberosa	Little Ladies'-tresses	Forb		S3	S1		S3
Spiranthes vernalis	Spring Ladies'-tresses	Forb	S2		S1		S3
Sporobolus asper	Long-leaved rushgrass	Graminoid		S1
Sporobolus clandestinus	Rough dropseed	Graminoid	S1	S2	S1		S1
Sporobolus compositus (var. compositus)	Longleaf dropseed	Graminoid				S1S2
Sporobolus heterolepis	Northern dropseed	Graminoid		S1	S1	S1
Sporobolus junceus	Purple dropseed	Graminoid				S1
Sporobolus neglectus	Small dropseed	Graminoid				S2
Stachys arenicola	Marsh hedgenettle	Forb				S1
Stachys aspera	Rough hedge-nettle	Forb		S1		S2	S1
Stachys cordata	Nuttall's hedge-nettle	Forb			S1
Stachys eplingii	Epling's hedge-nettle	Forb				S1	S1
Stachys latidens	Broad-toothed hedge-nettle	Forb		S1
Stachys nuttallii	Nuttall's hedge-nettle	Forb		S1			S3
Stachys tenuifolia	Smooth hedge-nettle	Forb	S1.1				S3
Steinchisma hians	Gaping panic grass	#N/A				S1
Stellaria alsine	Trailing stitchwort	Forb	S2	S1
Stellaria borealis	Mountain starwort	Forb
Stellaria borealis (ssp. borealis)	Northern stitchwort	Forb			S1S2		S1
Stenanthium gramineum (var. gramineum)	Featherbells	Forb		S1	S1S2		S2S3
Stenanthium gramineum var. micranthum	Tiny-flowered featherbells	Forb					S1
Stenanthium gramineum var. robustum	Stout featherbells	Forb					S1S2
Stenanthium leimanthoides	Death-camas	Forb		S1
Stewartia ovata	Mountain camellia	#N/A				S2
Stillingia sylvatica (ssp. sylvatica)	Queen’s delight	#N/A				S1
Stipulicida setacea (var. setacea)	Pineland scaly-pink	#N/A				S1
Streptopus amplexifolius	White twisted-stalk	#N/A			S1	S1
Streptopus roseus	Rose twisted-stalk	#N/A		S1S2
Strophostyles umbellata	Wild bean	#N/A			S2
Stylophorum diphyllum	Celandine poppy	Forb				S2
Stylosanthes biflora	Pencilflower	#N/A			S2
Suaeda linearis	Narrow-leaf seepweed	#N/A	S3	S3
Sullivantia sullivantii	Sullivantia	#N/A				S1
Swertia caroliniensis	American columbo	#N/A			S1
Symphoricarpos albus (var. albus)	Snowberry	Forb		S1		S2	S2
Symphyotrichum boreale	Rush aster	Forb			S1		S1
Symphyotrichum concolor	Silvery aster	Forb		S1
Symphyotrichum cordifolium	Heart-leaf aster	Forb	S3
Symphyotrichum depauperatum	Serpentine aster	Forb		S1	S2
Symphyotrichum drummondii	Drummond aster	Forb		S1
Symphyotrichum dumosum	Bushy aster	Forb			S1
Symphyotrichum elliottii	Elliott’s aster	Forb				S1
Symphyotrichum ericoides	White heath aster	Forb			S3
Symphyotrichum laeve var. concinnum	Narrow-leaved smooth blue aster	Forb	S1				S2
Symphyotrichum laeve (var. laeve)	Smooth blue aster	Forb	S1
Symphyotrichum novi-belgii	New York aster	Forb			S2		S2S3
Symphyotrichum ontarionis (var. ontarionis)	Ontario aster	Forb				S1
Symphyotrichum praealtum	Willow aster	Forb		S1	S3
Symphyotrichum praealtum var. angustior	Willow aster	Forb				S1
Symphyotrichum pratense	Silky aster	Forb				S1
Symphyotrichum prenanthoides	Crooked-stem aster	Forb	S1
Symphyotrichum shortii	Short's aster	Forb		S3		S1
Symplocos tinctoria	Sweetleaf	#N/A		S3
Synandra hispidula	Guyandotte beauty	#N/A				S2	S2
Syntrichia ammonsiana	Ammons's tortula						S1
Taenidia integerrima	Yellow pimpernel	Forb	S1.1
Taenidia montana	Mountain pimpernel	Forb		S2	S1		S3
Talinum teretifolium	Fameflower	Forb		S1			S1
Taxodium ascendens	Pond cypress	Tree				S1
Taxodium distichum	Bald cypress	Tree	S2
Taxus canadensis	American yew	Shrub		S2	S3S4		S2S3
Tephrosia spicata	Southern goat's rue	Forb		S1
Tetragonotheca helianthoides	Pineland squarehead	#N/A				S1
Teucrium canadense var. virginicum	American germander	Forb	S3
Thalictrum clavatum	Mountain meadow-rue	Forb					S2
Thalictrum coriaceum	Thick-leaved meadow-rue	Forb			S2
Thalictrum dasycarpum	Purple meadow-rue	Forb			S1
Thalictrum dioicum	Early meadow-rue	Forb	S1
Thalictrum macrostylum	Small-leaved meadow-rue	Forb				S1
Thalictrum revolutum	Waxleaf meadow-rue	Forb	S1
Thaspium barbinode	Hairy-jointed meadow-parsnip	Forb	S1
Thaspium trifoliatum	Purple meadow-parsnip	Forb		S1
Thelypteris simulata	Bog fern	Cryptogam	S2	S2		S1S2	S1
Thuja occidentalis	Arbor-vitae	#N/A		S1			S2
Tillandsia usneoides	Spanish moss	#N/A				S2
Tipularia discolor	Cranefly orchid	Forb			S3
Torreyochloa pallida var. fernaldii	Fernald's mannagrass	Graminoid		S1			S2
Torreyochloa pallida (var. pallida)	Pale mannagrass	Graminoid		S3			S1
Toxicodendron pubescens	Poison oak	Shrub	S2
Toxicodendron rydbergii	Giant poison-ivy	Shrub			S1	S1
Toxicodendron vernix	Poison sumac	Tree/Shrub	S3				S2
Trachelospermum difforme	Climbing dogbane	#N/A	S1	S1
Tradescantia virginiana	Virginia spiderwort	Forb	S3
Trautvetteria caroliniensis	Carolina tassel-rue	Forb		S3
Triadenum fraseri	Northern marsh St. John's-wort	Forb	S1.1			S1
Triadenum tubulosum	Large Marsh St. John's-wort	Forb		S1		S1	S1
Triadenum walteri	Walter St. John's-wort	Forb					S1
Triantha glutinosa	Sticky false-asphodel	Forb				S1	S1
Triantha racemosa	Coastal False-asphodel	Forb				S1
Trichomanes boschianum	Filmy fern	Cryptogam				S1	S1
Trichophorum planifolium	Bashful bulrush	Graminoid	S2	S2S3			S1
Trichostema brachiatum	False pennyroyal	Forb		S3
Trichostema setaceum	Narrowleaf bluecurls	Forb	S1	S1	S1	S2	S2
Tridens chapmanii	Chapman's purple-top	Graminoid	S1.1
Tridens flavus var. chapmanii	Chapman's redtop	Graminoid		S1
Trientalis borealis (subsp. borealis)	Northern starflower	Forb	S1
Trifolium calcaricum	Running glade clover	Forb				S1
Trifolium reflexum	Buffalo clover	Forb				S1	S1
Trifolium stoloniferum	Running buffalo clover	Forb					S3
Trifolium virginicum	Kate's mountain clover	Forb		S2S3	S1		S3
Triglochin striata	Three-ribbed arrow-grass	Graminoid		S1
Trillium cernuum	Nodding trillium	Forb	S2	S3	S2	S2	S1
Trillium erectum	Ill-scented trillium	Forb	S1.1
Trillium flexipes	Drooping trillium	Forb		S1	S2	S1	S2
Trillium nivale	Snow trillium	Forb		S1	S3	S1	S2
Trillium pusillum var. virginianum	Least trillium	Forb		S2		S2	S1
Triosteum angustifolium (var. angustifolium)	Yellowleaf tinker's-weed	#N/A	S1	S1	S1
Triosteum aurantiacum (var. aurantiacum)	Coffee tinker's-weed	#N/A	S1
Triosteum perfoliatum	Perfoliate tinker's-weed	#N/A	S1.1
Triphora trianthophora	Nodding pogonia	Forb	S1	S1		S1	S2
Triplasis purpurea	Purple sandgrass	Graminoid			S1
Tripsacum dactyloides	Eastern gamma-grass	Graminoid			S1
Trisetum spicatum	Narrow false oats	Graminoid			S1	S1
Trollius laxus	Spreading globeflower	Forb			S1
Tsuga canadensis	Eastern hemlock	Tree	S1
Typha domingensis	Southern cattail	Forb		S3
Utricularia cornuta	Horned bladderwort	Forb			S2
Utricularia geminiscapa	Hidden-fruited bladderwort	Forb	S3				S1
Utricularia gibba	Humped bladderwort	Forb	S3				S2
Utricularia inflata	Large swollen bladderwort	Forb	S1	S1
Utricularia intermedia	Flat-leaved bladderwort	Forb			S2
Utricularia juncea	Southern bladderwort	Forb	S2			S2
Utricularia macrorhiza	Greater bladderwort	Forb					S1
Utricularia purpurea	Purple bladderwort	Forb	S1	S1		S2
Utricularia resupinata	Reversed bladderwort	Forb	S2	S1
Utricularia striata	Fibrous bladderwort	Forb	S3	S1		S1
Utricularia subulata	Zigzag bladderwort	Forb	S2	S3
Uvularia grandiflora	Large-flowered bellwort	Forb		S1
Uvularia pudica	Mountain bellwort	Forb			S3
Vaccinium crassifolium	Creeping blueberry	Shrub				S1
Vaccinium macrocarpon	Large cranberry	Shrub	S3	S3		S2	S3
Vaccinium myrtilloides	Velvetleaf blueberry	Shrub		S3		S1S2
Vaccinium oxycoccos	Small cranberry	Shrub		S2			S3
Valeriana pauciflora	Valerian	Forb		S1		S2
Valerianella chenopodiifolia	Goose-foot cornsalad	Forb		S1
Vallisneria americana	Tape-grass	Forb	S3
Veratrum virginicum	Virginia bunchflower	Forb	S2		S1
Verbena scabra	Sandpaper vervain	Forb				S2
Vernonia glauca	Tawny ironweed	Forb	S3		S1		S1
Veronica americana	American speedwell	Forb	S1
Veronica scutellata	Marsh speedwell	Forb		S1		S1	S2
Veronicastrum virginicum	Culver's-root	Forb	S1
Viburnum lentago	Nannyberry	Shrub	S1.1	S1			S1S2
Viburnum nudum	Possum-haw	Shrub			S1
Viburnum opulus var. americanum	Highbrush cranberry	Shrub					S1
Viburnum rafinesquianum	Downy arrow-wood	Shrub	S1				S2
Viburnum rufidulum	Rusty blackhaw	Shrub					S1
Viburnum trilobum	Highbush-cranberry	Shrub			S1S2
Vicia americana (ssp. americana)	American purple vetch	#N/A				S1S2
Viola appalachiensis	Appalachian Blue violet	Forb		S2	S3S4		S3
Viola blanda	Smooth white violet	Forb	S3
Viola blanda var. palustriformis	Large-leaved white violet	Forb		S1
Viola brittoniana (var. brittoniana)	Coast violet	Forb	S3		S1
Viola labradorica	American dog violet	Forb	S3
Viola macloskeyi var. pallens	Smooth white violet	Forb	S1
Viola palmata	Palmate-leaved violet	Forb	S3
Viola pedata	Bird's-foot violet	Forb	S1
Viola pedatifida	Crowfoot violet	Forb				S1
Viola renifolia	Kidney-leaved white violet	Forb			S1
Viola rostrata	Long-spurred violet	Forb		S3
Viola rotundifolia	Roundleaf violet	Forb	S2
Viola selkirkii	Great-spurred violet	Forb			S3S4
Viola septentrionalis	Northern blue violet	Forb					S2
Viola striata	Striped violet	Forb	S3
Viola tripartita	Three-parted violet	Forb					S1
Viola walteri	Prostrate blue violet	Forb				S2
Vitis novae-angliae	New England grape	Vine			S1
Vitis rupestris	Sand grape	Vine		S1	S1		S2
Vittaria appalachiana	Appalachian gametophyte	#N/A			S2		S1
Wisteria frutescens	American wisteria	Vine				S2
Wolffia columbiana	Columbia water-meal	Forb		S3		S1	S1
Wolffia papulifera	Water-meal	Forb		S2
Wolffia punctata	Dotted water-meal	Forb		S2
Wolffiella gladiata	Bog-mat	Forb			S2
Woodsia appalachiana	Allegheny cliff fern	Cryptogam					S2
Woodsia ilvensis	Rusty woodsia	Cryptogam		S1			S2
Woodsia obtusa (subsp. obtusa)	blunt-lobe woodsia	Cryptogam	S1
Woodwardia areolata	Netted chainfern	Cryptogam			S2		S2
Xerophyllum asphodeloides	Eastern turkeybeard	#N/A					S1
Xyris caroliniana	Carolina yelloweyed-grass	Forb				S1
Xyris difformis var. curtissii	Curtiss’ yelloweyed-grass	Forb				S1
Xyris fimbriata	Fringed yelloweyed-grass	Forb	S1	S1		S1
Xyris laxifolia var. iridifolia	Irisleaf yelloweyed-grass	Forb				S1
Xyris platylepis	Tall yelloweyed-grass	Forb				S2
Xyris smalliana	Small's yelloweyed-grass	Forb	S2	S1
Xyris torta	Twisted yelloweyed-grass	Forb	S3		S1		S2
Zannichellia palustris	Horned pondweed	Forb	S2				S1
Zanthoxylum americanum	Northern prickly-ash	#N/A		S1
Zenobia pulverulenta	Dusty zenobia	#N/A				S1
Zephyranthes atamasca	Atamasco lily	Forb		S1
Zigadenus densus	Dense-flowered camas	Forb				S1
Zigadenus elegans ssp. glaucus	White camas	Forb					S1
Zigadenus glaberrimus	Large-flowered camas	Forb				S1
Zigadenus glaucus	White camas	Forb			S1
Zigadenus leimanthoides	Oceanorus	Forb				S1	S3
Zizania aquatica	Indian wild rice	Graminoid			S3
Zizaniopsis miliacea	Southern wild rice	Graminoid		S1
Zizia aptera	Wingless alexander	Forb	S1
Zizia aurea	Golden alexander	Forb	S2	S3
Zornia bracteata	Viperina	Forb				S1
Zostera marina var. stenophylla	Eel-grass	Graminoid	S1

Rankings follow those developed by NatureServe (Faber-Langendoen et al. 2009)
^aConservation Rankings:
^bMcAvoy 2011
^cMaryland Department of Natural Resources 2010
^dPennsylvania Natural Heritage Program 2011
^eVirginia Department of Conservation and Recreation 2009
^fWest Virginia Natural Heritage Program 2007
S1—Critically Imperiled: critically imperiled in the jurisdiction because of extreme rarity or because of some factor(s) such as very steep declines making it especially vulnerable to extirpation from the jurisdiction
S2—Imperiled: imperiled in the jurisdiction because of rarity due to very restricted range, very few populations or occurrences, steep declines, or other factors making it very vulnerable to extirpation from the jurisdiction
S3—Vulnerable: vulnerable in the jurisdiction due to a restricted range, relatively few populations or occurrences, recent and widespread declines, or other factors making it vulnerable to extirpation

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Chamberlain, S.J., Wardrop, D.H., Fennessy, M.S., DeBerry, D. (2013). Hydrophytes in the Mid-Atlantic Region: Ecology, Communities, Assessment, and Diversity. In: Brooks, R., Wardrop, D. (eds) Mid-Atlantic Freshwater Wetlands: Advances in Wetlands Science, Management, Policy, and Practice. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-5596-7_6

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DOI: https://doi.org/10.1007/978-1-4614-5596-7_6
Published: 17 December 2012
Publisher Name: Springer, New York, NY
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Hydrophytes in the Mid-Atlantic Region: Ecology, Communities, Assessment, and Diversity

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Appendix: Conservation Status Ranks for Vascular Plant Species Occurring in States within the Mid-Atlantic Region

Appendix: Conservation Status Ranks for Vascular Plant Species Occurring in States within the Mid-Atlantic Region

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