Nephrodium filix-mas (Linnaeus) Richard var. fibrillosum C. B. Clarke, Trans. Linn. Soc. London, Bot. 1(8): 520. 1880; Dryopteris chingii N. C. Nair, nom. illeg. superfl.; D. fibrillosa (C. B. Clarke) Handel-Mazzetti (1922), not (Baker) Christ (1905); D. filix-mas (Linnaeus) Schott subsp. fibrillosa (C. B. Clarke) C. Christensen; N. clarkei Baker var. fibrillosum (C. B. Clarke) Handel-Mazzetti; N. parallelogrammum (Kunze) C. Hope f. fibrillosum (C. B. Clarke) C. Hope.

Plants 40-70 cm tall. Rhizome erect, densely scaly; scales dark brown, lanceolate, dentate, apex subulate. Fronds caespitose; stipe 10-15 cm, base densely clothed with narrowly lanceolate, black or blackish brown scales with subulate, twisted apex; lamina lanceolate, 30-55 cm, ca. 15 cm wide at middle, bipinnate, gradually tapering toward a markedly narrow and slightly truncate base; pinnae ca. 25 pairs, spreading, alternate or subopposite, ca. 2 cm apart, lanceolate, subsessile, middle pinnae ca. 7 × 1.5 cm, basal pairs gradually shortened, basal pair only ca. 3 cm; segments 14-16 pairs, slightly oblique, approximate, oblong, ca. 1 × 3-4 mm, margin subentire, slightly reflexed, apex rounded-obtuse or truncate, dentate or undulate. Lamina thinly papery, glabrous adaxially, with pale brown scales abaxially; rachis with lanceolate, dark brown scales below, and with hairlike, brown scales above, costae with sparse hairlike scales; veins pinnate, forked, visible abaxially. Sori between costa and margin; indusia orbicular-reniform. n = 82.

Coniferous forests; 2800-4000 m. Sichuan, Xizang, Yunnan [India, Kashmir, Nepal, Pakistan].