厚边蕨 hou bian jue

Trichomanes humile G. Forster, Fl. Ins. Austr. 8: 84. 1786; Crepidophyllum humile (G. Forster) C. F. Reed; Crepidopteris humilis (G. Forster) Copeland; Reediella humilis (G. Forster) Pichi Sermolli.

Plants 2-8 cm tall. Rhizome dark brown, ca. 0.4 mm in diam., densely covered with short hairs. Stipes remote, 1-2 cm apart, light brown, slender, 4-10 cm × 0.3-0.5 mm, with dark brownish short hairs in lower part, winged in upper part. Rachis dark brown, winged throughout, with sparse brown short hairs, hairs caducous. Rachis and costa slightly zigzag. Lamina bipinnatifid, ovate to ovate-lanceolate, 2-7 × 1.5-2 cm, base cuneate or subcordate, apex obtuse; pinnae 5-10 pairs, closely spaced, alternate, sessile, oblong-ovate, 8-12 × 3.5-6 mm, base unequally cuneate, apex obtuse; ultimate segments oblong to linear, 1.5-3.5 × 1-1.2 mm, decurrent to costa and rachis forming wings, slightly crisped, simple or rarely forked, with a single veinlet, apex rounded to obtuse. Veins dichotomous, slightly raised on each surface, dark brown, with sparse brown short hairs, hairs caducous. Sori on upper parts of frond, apical on short acroscopic segments; involucres tubular, ca. 2 × 0.5 mm, winged, lobes not constricted below base of involucre; mouth broadly dilated, nearly circular as seen from above; receptacles projecting, ca. 4 mm, slender. 2n = 72.

On moss-covered rocks in forests; near sea level to 300 m. E and S Taiwan [Indonesia, Japan (Ryukyu Islands), Malaysia, Philippines, Thailand; Pacific islands (Melanesia, Micronesia, Polynesia)].