Thelypteris subg. Parathelypteris

(H. Itô) R. M. Tryon & A. F. Tryon

Rhodora 84: 128. 1982.

Basionym: Thelypteris sect. Parathelypteris H. Itô in Nakai & Honda, Nov. Fl. Jap. 4: 127. 1939
Synonyms: Undefined subg. Parathelypteris (H. Itô) Ching
Treatment appears in FNA Volume 2.

Distinguished from other subgenera by the combination of seasonal leaves, narrow, long-creeping stems 1–3 mm diam., pinnate-pinnatifid blades with generally greatly reduced proximal pinnae (except Thelypteris simulata), and veins meeting margin above the sinuses. x = 27, 32.


Species 1–3 are included in Parathelypteris by some workers (e.g., R. E. Holttum 1976).

Selected References