Hymenophyllaceae

  • Rolla M. Tryon
  • Alice F. Tryon
Chapter

Abstract

Stem erect to decumbent, small, or usually long-creeping and very slender, sometimes branched, protostelic, more or less indurated, bearing usually short trichomes; leaves small, sometimes minute (2–5 mm), or rarely to 2 m long, entire to pinnate, glabrous to pubescent, thin and lacking stomates, circinate in bud unless very small, petiole without stipules; sporangia borne in marginal sori on a short to elongate receptacle, enclosed by a bivalved to tubular indusium, with a short, ca. 6-rowed stalk, and an oblique annulus not interrupted by the stalk; homosporous, spores with chlorophyll (green). Gametophyte epigeal, with chlorophyll, narrowly thalloid or filamentous, freely branched, sometimes with gemmae, the archegonia borne on the lower surface or in clusters on a filamentous branch, the antheridia with ca. 5 to many cells, mostly on the lower surface or on filamentous branches.

Keywords

Chromosome Number Falkland Island American Tropic Black Border Proximal Face 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© Springer-Verlag New York Inc. 1982

Authors and Affiliations

  • Rolla M. Tryon
    • 1
  • Alice F. Tryon
    • 1
  1. 1.Harvard University HerbariaCambridgeUSA

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