翅柄叉蕨 chi bing cha jue

Aspidium vastum Blume, Enum. Pl. Javae 2: 142. 1828; A. alatum Hooker & Greville; Sagenia alata (Hooker & Greville) Beddome; S. vasta (Blume) T. Moore; Tectaria decurrentialata Ching & Chu H. Wang.

Plants terrestrial, 60-150 cm tall. Rhizome erect or suberect. Stipes clustered, densely scaly at base; scales deep stramineous to brown, dark brown, broadly lanceolate, 40-45 cm, ca. 1 cm in diam., membranous, with light brown articulate hairs, broadly winged nearly to base, entire, apices acuminate. Lamina odd-pinnatipartite, deep green when dried, oblong, 30-60 × 30-35 cm, thinly herbaceous, both surfaces glabrous; rachises and costae stramineous, glabrous adaxially, slightly pubescent abaxially; terminal lobe ovate-lanceolate, 25-30 × ca. 10 cm, base narrowed and decurrent to broad wings along entire rachis, apex acuminate, undulate to toothed, sessile; lateral lobes 1-4 pairs, homomorphic but smaller, opposite, oblique upward, sessile, without gemmae, broadly lanceolate, ca. 20 × 8 cm, bases narrowed and adnate to rachis, apices caudate, subentire or undulate, basal lobes lobed to form smaller lanceolate lobes. Veinlets forming conspicuous subhexagonal areoles, included veinlets forked, glabrous on both sides. Sori orbicular, on anastomosing veins, in irregular rows between lateral veins; indusia brown, orbicular, membranous, caducous.

Near streams in dense forests; 600-800 m. Yunnan (Cangyuan, Jinping, Lüchun) [N India, Indonesia, Malaysia, Thailand].