多羽瘤蕨 duo yu liu jue

Polypodium longissimum Blume, Enum. Pl. Javae 2: 127. 1828; Colysis longissima (Blume) J. Smith; Microsorum rubidum (Kunze) Copeland; Phymatodes longissima (Blume) J. Smith; Phymatosorus suisha-stagnalis (Hayata) Pichi Sermolli; Pleopeltis longissima (Blume) T. Moore; Polypodium rubidum Kunze; P. suisha-stagnale Hayata.

Rhizome 8-10 mm in diam., sparsely scaly; scales ovate-lanceolate, ca. 3 mm, peltate, clathrate, base rounded, margin irregularly toothed, apex acuminate. Stipe straw-colored, 35-100 cm, up to 10 mm in diam. near base, glabrous, upper portion winged. Lamina pinnatifid or pinnatisect at lower portion, oblong in outline, 40-100(-130) × 25-30(-50) cm; lateral lobes (10-)20-30(-40) pairs, ascending, linear-lanceolate, usually 8-12 × 1-2.5 cm, herbaceous or leathery, both surfaces glabrous, base slightly narrowed and decurrent to rachis, margin entire or crisped, apex acuminate or obtuse; lateral veins and veinlets obscure, areoles with included veinlets. Sori orbicular to ellipsoid, in 1 row on each side of midrib, slightly nearer to midrib, abaxially sunken and adaxially raised.

In rather wet places; low elevations. Hainan, Hong Kong, Taiwan (Pingdong, Taidong), Yunnan [India, Indonesia, Japan, Malaysia, Philippines, Sri Lanka, Thailand, Vietnam; Pacific islands (Polynesia)].