Thelypteris
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- Beaver Lake Fern Project 3
- Long Beech-Fern (Phegopteris Connectilis) in Saskatchewan
- Shrub and Herbs Flora
- Prairie Fen Companion Plant Facts: Eastern Marsh Fern
- References 510 8 3 7 6 5 6 Line, WNC 95
- TAXONOMY Family Names Scientific Names
- A Classification for Extant Ferns
- ARPR Volume 32 (2018)
- The Family Thelypteridaceae in Europe
- Taxonomic Changes in Hawaiian Ferns and Lycophytes1
- Annotated Checklist of the Vascular Plants of the Washington - Baltimore Area
- Thelypteris Noveboracensis (New York Fern) New to Missouri from the Southeastern Missouri Ozarks
- Thelypteris Confluens
- Global Flora Vol 4
- Phegopteris, Pseudophegopteris, Are Normally All Unicellular, but in Some
- Lincoln Ferns
- USDA, Natural Resources Conservation Service, New York
- Proceedings of the Indiana Academy of Science