宽片膜蕨 kuan pian mo jue

Hymenophyllum alishanense De Vol.

Plants 4-10 cm tall. Rhizome dark brown, ca. 0.3 mm in diam., subglabrous, with filiform rootlets. Stipes remote, 1-3 cm apart, dark brown, filiform, columnar, 1-3 cm, subglabrous, narrowly winged at apex. Rachis dark brown, broadly winged throughout, slightly zigzag, glabrous or nearly so. Lamina pinnate to bipinnatifid, linear-oblong to linear-lanceolate, (3-)5-8 × 1.5-2.5 cm, membranous and semitransparent, glabrous; pinnae (3-)5-8 pairs, 2-3 mm apart, alternate, sessile, obdeltoid to obovate, 1-1.5 cm × 6-8 mm; ultimate segments oblong, short, 1.5-2 × 2-4 mm, with 1 or 2 veinlets, margin irregularly serrate, apex obtuse or truncate. Veins dichotomous, dark brown, filiform, obviously raised on each surface. Sori terminal on ultimate segments; involucres oblong to oval, deeply cleft to base, irregularly serrate and obtuse at apex; receptacles clavate, usually included.

Wet places in forests; 1600-3000 m. Taiwan, Xizang, Yunnan [Bhutan, NE India, Nepal].