二型鳞毛蕨 er xing lin mao jue

Nephrodium cochleatum Buchanan-Hamilton ex D. Don, Prodr. Fl. Nepal. 6. 1825; Aspidium cochleatum (Buchanan-Hamilton ex D. Don) Christ; A. filix-mas (Linnaeus) Swartz var. cochleatum (Buchanan-Hamilton ex D. Don) Christ; Dryopteris filix-mas (Linnaeus) Schott var. cochleata (Buchanan-Hamilton ex D. Don) Alderwerelt; Lastrea cochleata (Buchanan-Hamilton ex D. Don) T. Moore; L. filix-mas (Linnaeus) C. Presl var. cochleata (Buchanan-Hamilton ex D. Don) Beddome; Nephrodium filix-mas (Linnaeus) Richard var. cochleatum (Buchanan-Hamilton ex D. Don) Hooker.

Plants 60-70 cm tall. Rhizome creeping, densely clothed with linear-lanceolate, entire, bright scales. Fronds approximate, dimorphic; stipe of sterile frond stramineous, 20-30 cm, sparsely clothed with linear and linear-lanceolate, brown scales; lamina ovate, 30-40 cm, widest (ca. 22 cm wide) at base, bipinnatipartite, base cordate, apex acuminate; pinnae 10-12 pairs, remote, basal pair deltoid-lanceolate, 10-12 × 3-4 cm, shortly stalked, apex acuminate; pinnules (segments) 10-12 pairs, oblique, oblong or subfalcate, margin incised-serrate, apex obtuse, basiscopic pinnules longer than acroscopic ones, base of basiscopic side undeveloped; pinnae above second pair lanceolate, base cordate, shortly stalked, apex acuminate, basiscopic pinnules similar to acroscopic ones. Lamina herbaceous; rachis and costa subglabrous, with sparse, linear, brown scales; veins pinnate, not forked, obscure adaxially, distinct abaxially. Stipe of fertile frond stramineous, base clothed with linear-lanceolate, brown scales, glabrous upward. Fertile lamina oblong-lanceolate, bipinnate, base slightly narrowed or not, apex acuminate; pinnae 10-12 pairs, ca. 1 cm apart, barred, ca. 1.5 cm × 2-3 mm, stalked, apex obtuse. Sori in 2 regular rows on each pinnule (segment); indusia ferruginous, orbicular-reniform, entire.

Broad-leaved forests; 1200-1600 m. Guizhou, Sichuan, Yunnan [Bangladesh, Bhutan, India, Indonesia, Kashmir, Myanmar, Nepal, Philippines, Thailand].