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Thelypteris Schmidel. Marsh Fern.

A genus of 2 species, perennial herbs, circumboreal in distribution (with several varieties) and also with a Southern Hemisphere member. Often in the past considered a large genus (with about 1190 species), clearly warranting segregation, a consensus has developed to recognize smaller genera in Thelypteridaceae, as reflected in this treatment. Our species fall into several disparate groups, here recognized as genera, following much recent literature and synopsized in PPG I (2016).

ID notes:In the northern and/or or more montane parts of our region, Coryphoteris simulata is similar to and can be mistaken for Thelypteris palustris var. pubescens; see Coryphopteris for identification notes.

Ref: Fawcett & Smith (2021); He & Zhang (2012); Lin et al. (2013); PPG I (2016); Smith (1981); Smith (1993a) In Flora of North America Editorial Committee (1993b); Smith & Flory (1990). Show full citations.

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image of plant© Alan Cressler: Thelypteris palustris var. pubescens, Hurricane Creek Outlet Bog, Upper Nantahala River, Nantahala National Forest, Macon County, North Carolina 3 by Alan Cressler | Thelypteris palustris var. pubescens source | Original Image ⭷
image of plant© Alan Cressler: Thelypteris palustris var, pubescens, Deep Spring run, Whitfield County, Georgia 2 by Alan Cressler | Thelypteris palustris var. pubescens source | Original Image ⭷

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