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

52. Dryopteris rosthornii (Diels) C. Christensen, Index Filic. 289. 1905.

川西鳞毛蕨 chuan xi lin mao jue

Nephrodium rosthornii Diels, Bot. Jahrb. Syst. 29: 190. 1900; Aspidium filix-mas (Linnaeus) Swartz var. omeiense Christ; A. xanthomelas Christ; Dryopteris centrochinensis Ching; D. filix-mas (Linnaeus) Schott var. rosthornii (Diels) C. Christensen; D. hupehensis Ching; D. omeicola Ching; D. xanthomelas (Christ) C. Christensen.

Plants 60-80 cm tall. Rhizome erect, densely scaly; scales black or dark brown, lanceolate or linear-lanceolate. Fronds caespitose; stipe ca. 14 cm, ca. 4 mm in diam., base densely scaly; scales dark brown, broadly lanceolate, upper part and rachis clothed with linear-lanceolate and linear, dentate, glossy, amber scales; lamina elliptic-lanceolate, ca. 60 × 18 cm, widest at middle, tapered at base; pinnae ca. 20 pairs, broadly lanceolate, ca. 9 × 2.5 cm, widest at middle, base rounded, shortly stalked, apex caudate-acuminate; segments ca. 15 pairs, oblique, oblong, ca. 1.2 cm × 4 mm, apex obtuse, weakly dentate. Lamina herbaceous; costae with sparse, brown scales adaxially, and brownish black, linear-lanceolate scales abaxially; veins pinnate, 2-forked, acroscopic basal veinlet undivided. Sori on upper part of lamina, 4-6 pairs on each segment; indusia brown, orbicular-reniform, membranous.

● Forests; 1500-2500 m. Gansu (Xigu), Guizhou, Hubei, Shanxi, Sichuan, Yunnan.


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