栗柄鳞毛蕨 li bing lin mao jue

Acrorumohra yoroii (Serizawa) W. C. Shieh; Aspidium nitidulum Wallich ex Kuhn; Dryopteris nitidula (Wallich ex Kuhn) Mitsuta & S. K. Wu; D. sparsa (D. Don) Kuntze var. nitidula (Wallich ex Kuhn) C. Christensen; Lastrea sparsa (D. Don) T. Moore var. nitidula (Wallich ex Kuhn) Beddome; Nephrodium sparsum D. Don var. nitidulum (Wallich ex Kuhn) C. B. Clarke.

Plants 35-50 cm tall. Rhizome erect or obliquely ascending, short, densely scaly; scales brown, lanceolate, entire. Fronds caespitose, usually dimorphic; fertile frond with stipe 15-20 cm, castaneous, glossy, base sparsely clothed with ovate or ovate-lanceolate, entire, brown scales; lamina ovate-oblong or deltoid-ovate, 15-25 × 10-15 cm, bipinnate to tripinnatilobate, base not narrowed, apex acuminate; pinnae 7-9 pairs, opposite or subopposite, slightly obliquely ascending, shortly stalked, basal pair largest, deltoid-lanceolate, slightly falcate, 5-8 × 3-5 cm, apex acuminate, remaining pinnae lanceolate; pinnules 7-9 pairs, alternate, oblong-lanceolate, base broadly cuneate, usually asymmetrical, basiscopic pinnule of basal pair longer than others, 3-4 × 1-2 cm, widest at base; segments oblong, apices obtuse with several acute teeth. Sterile frond larger than fertile one, lamina with more teeth. Lamina subpapery, both surfaces glabrous; veins pinnate, forked, obscure adaxially, conspicuous abaxially. Sori on middle of veinlets; indusia orbicular-reniform, entire.

Forests, by streams, on wet rocks; 500-3200 m. Guangxi, Guizhou, Sichuan, Taiwan, Xizang, Yunnan [Bhutan, India, Myanmar, Nepal].