多羽实蕨 duo yu shi jue

Leptochilus angustipinnus Hayata, Icon. Pl. Formosan. 5: 297. 1915; Bolbitis contaminans Ching; Campium angustipinnum (Hayata) Copeland; L. cuspidatus (C. Presl) C. Christensen var. crenatus Rosenstock.

Rhizome long creeping, 10-16 cm, robust, 1-2 cm in diam., with 2-4 rows of fronds, densely scaly; scales dark brown or blackish, lanceolate, 4-6 mm, subclathrate. Fronds close together; sterile fronds pinnate, 55-145 cm; stipe 40-60 cm, near base ca. 8 mm in diam., sparsely scaly, with 7-16 vascular bundles; lamina gray-green when dry, elliptic, 60-85 × 30-45 cm, widest somewhat below middle, hard herbaceous; pinnae 12-20 pairs, alternate, linear-lanceolate, usually widest at (to below) middle, 15-25 × 2-3 cm, base ± symmetrical, broadly attenuate or truncate, margin slightly serrate-crenate, with a short spine in each sinus, apex acuminate, lowermost 2 pinnae with short stalk; terminal segment joined to rachis, usually narrowly triangular, ± similar to central pinnae, 10-20 cm, bulbil subterminal; rachis not winged; secondary veins prominent; veins forming a costal areole and 3 rows of distal areoles, without included free veinlets. Fertile fronds 50-150 cm; stipe 30-85 cm; lamina 70-90 × 15-25 cm; pinnae 80-120 × 5-8 mm. Sporangia inserted usually throughout abaxial surface, arrangement fully acrostichoid, sometimes with a sterile strip along costa.

On rocks or near streams in dense forests; 200-1400 m. Hainan, Taiwan, Yunnan [Bhutan, India, Myanmar, Nepal, Sri Lanka, Thailand].