具柄线蕨 ju bing xian jue

Ceterach pedunculatum Hooker & Greville, Icon. Filic. 1: t. 5. 1827; Colysis bonii Ching; C. fluviatila (Lauterbach) Ching; C. intermedia Ching & Chu H. Wang; C. membranacea (Blume) C. Presl; C. pedunculata (Hooker & Greville) Ching; C. saxicola H. G. Zhou & Hua Li; C. wui Ching; Grammitis membranacea Blume; Gymnogramma membranacea (Blume) Hooker; Leptochilus macrophyllus (Blume) Nooteboom var. fluviatilis (Lauterbach) Nooteboom; L. macrophyllus var. pedunculatus (Hooker & Greville) Nooteboom; Pleopeltis fluviatilis (Lauterbach) Alderwerelt; Polypodium bonii (Ching) Christ; P. fluviatile Lauterbach; P. pedunculatum (Hooker & Greville) Mettenius; P. wui C. Christensen; Selliguea membranacea (Blume) Blume; S. pedunculata (Hooker & Greville) C. Presl.

Rhizome slender, creeping, densely scaly, roots many; scales brown, ovate-lanceolate, 1.4-3.8 × 0.2-1 mm, margin sparsely denticulate, apex acuminate. Fronds subdimorphic, distant; stipe stramineous, 5-35 cm; lamina oblong or ovate-lanceolate, 15-25 × 2-7 cm, herbaceous, glabrous, base abruptly narrowed into narrowly winged stipe, margin entire or slightly undulate, apex acuminate or obtuse; lateral veins oblique, veinlets forming 2 rows of areoles between 2 adjacent lateral veins, free included veinlets 1- or 2-forked. Sori linear, ranging from midvein to margin of lamina, 1 row between lateral veins.

On rocks in forests or terrestrial. Guangxi, Hainan, Yunnan [India, Indonesia, Thailand, Vietnam].