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

75. Dryopteris angustifrons (Hooker) Kuntze, Revis. Gen. Pl. 2: 812. 1891.

狭叶鳞毛蕨 xia ye lin mao jue

Nephrodium splendens Hooker var. angustifrons Hooker, Sp. Fil. 4: 126. 1862; Lastrea angustifrons (Hooker) Beddome; N. angustifrons (Hooker) Baker.

Plants up to 90 cm tall. Rhizome creeping, stout, densely clothed with ovate, pale brown scales. Fronds remote; stipe stramineous, ca. 30 cm, ca. 4 mm in diam., sparsely scaly at base; scales pale brown, ovate, entire, bluntly acuminate; lamina oblong, 50-55 × 12-17 cm, widest at middle, tripinnatipartite, base slightly shortened, apex acuminate; pinnae 12-14 pairs, oblique, remote, lowest 2 or 3 pairs deltoid-lanceolate, 10-13 cm, widest at base, 5-10 cm wide, with short stalk 6-8 mm, apex acuminate; pinnules oblong-lanceolate, basal pair 3-5 cm, widest at base, 1-1.5 cm wide, cuneate, shortly stalked, apex bluntly acuminate; segments 5-7 pairs, oblique, oblong, margin entire or incised-serrate, apex obtuse, remotely deltoid-serrate; pinnae above middle part oblong-lanceolate, bipinnately lobed. Lamina herbaceous; rachis sparsely clothed with oblong-lanceolate or deltoid-subulate, pale brown scales and nodose, hair-shaped scales; costa sparsely clothed with lanceolate scales; veins pinnate, forked, slightly conspicuous adaxially, convex abaxially, apex with conspicuous hydathode. Upper part of lamina fertile, sori in 1 row on each side of costule; indusia ferruginous, orbicular-reniform, thick, persistent.

Mixed Pinus-Quercus forests, by streams; 2100-2700 m. W Yunnan [India, C Myanmar, Nepal].


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