Thelypteridaceae

  • Rolla M. Tryon
  • Alice F. Tryon
Chapter

Abstract

Stem erect, decumbent or to very long-creeping, stout to slender, with a dictyostele, usually indurated, bearing scales; leaves ca. 10 cm to 5 m long, entire or usually pinnate, circinate in the bud, petiole without stipules; sporangia borne in roundish to elongate abaxial sori or rarely also on the leaf-tissue, indusiate, the indusium usually reniform, or exindusiate, mostly rather short-stalked, the stalk 2- to 3-rowed below its apex, the vertical annulus interrupted by the stalk; homosporous, spores lacking cholorphyll. Gametophyte epigeal, with chlorophyll, more or less obcordate, slightly thickened centrally, often with unicellular, rarely multicellular trichomes and (or) glands, archegonia borne on the lower surface, mostly in the central region, antheridia 3-celled, borne on the lower surface, mostly among the archegonia.

Keywords

Chromosome Number Surface Detail Basal Vein Primary Vein American Tropic 
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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Literature

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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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