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FOC | Family List | FOC Vol. 2-3 | Dryopteridaceae | Dryopteris

117. Dryopteris assamensis (C. Hope) C. Christensen & Ching, Bull. Dept. Biol. Sun Yatsen Univ. 6: 4. 1933.

阿萨姆鳞毛蕨 a sa mu lin mao jue

Nephrodium assamensis C. Hope, J. Bot. 28: 326. 1890; Dryopteris filix-mas (Linnaeus) Schott subsp. assamensis (C. Hope) C. Christensen; Lastrea filix-mas (Linnaeus) C. Presl var. assamensis (C. Hope) Beddome.

Rhizome ascending, 2.5-3 cm in diam., densely covered with scales at apex. Fronds caespitose. Stipes stramineous, 25-30 cm, 2-3 mm in diam., base very dark brown and densely covered with scales; scales stiff, black or nearly black, linear-lanceolate; upward scales becoming very small, black or dark brown, lanceolate. Lamina ovate-lanceolate, 25-30 × 20-25 cm, base as wide as middle, bipinnate. Pinnae 10-13 pairs, opposite or subopposite, lanceolate, 10-13 × 2.5-3 cm, stalked, acuminate. Pinnules 8-10 pairs, oblong, 1-2 cm × 6-8 mm, cuneate at base, serrate or pinnatifid, rounded and with acute apical teeth; upper part adnate at base and decurrent at basiscopic. Segments with acute teeth at apex. Veins pinnate or forked, obscure abaxially. Lamina herbaceous, dark green, subglabrous adaxially, scaly on abaxial surface of pinna rachis and costa; scales black or dark brown, bullate; rachis subglabrous. Sori medial or slightly nearer to margin; indusia brown, reniform, curved over sorus, entire.

Tropical or subtropical forests. Guangdong, Guangxi, Guizhou, Yunnan [N India, Vietnam].


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