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FOC | Family List | FOC Vol. 2-3 | Athyriaceae | Athyrium

73. Athyrium dubium Ching, Bull. Fan Mem. Inst. Biol., n.s. 1: 281. 1949.

毛翼蹄盖蕨 mao yi ti gai jue

Asplenium filix-femina (Linnaeus) Bernhardi subvar. rubricaule Edgeworth ex C. B. Clarke; Athyrium acutum Ching; A. aequilaterale Ching; A. filix-femina (Linnaeus) Roth subvar. rubricaule (Edgeworth ex C. B. Clarke) Beddome; A. longipinnum Ching; A. machangense Ching; A. rubricaule (Edgeworth ex C. B. Clarke) Bir; A. serratodentatum Ching; A. sublineare Ching; A. uniseriatum Ching.

Rhizomes short, erect, apex densely clothed with brown or dark brown, lanceolate scales. Fronds caespitose; fertile fronds 45-70 cm; stipe blackish brown, upward pale stramineous, 20-25 cm, 2-3 mm in diam., base densely clothed with scales, upward glabrate; lamina pinnate, oblong, 30-40 × ca. 16 cm at middle, base hardly narrowed, apex acuminate; pinnae pinnatipartite or nearly 2-pinnate, ca. 15 pairs, lower pinnae subopposite, upper pinnae alternate, spreading or slightly ascending, sessile, lanceolate, basal pinnae slightly shortened, middle pinnae 8-12 × 1.8-2.2 cm at base, base truncate, equilateral, pinnate, apex acuminate; pinnules ca. 20 pairs, basal pinnules opposite, upper pinnules alternate, spreading, oblong, ca. 1.3 cm × ca. 6 mm, base inequilateral, subtruncate, slightly auriculate on acroscopic side, cuneate on basiscopic side, decurrent and adnate to wing of costules, pinnatilobate, apex obtuse; pinnule segments ca. 6 pairs, obtuse-rounded, toothed (occasionally laciniate) at apex; veins inconspicuous adaxially, visible abaxially, pinnate in pinnules, lateral veins pinnate in larger segments, 2- or 3-forked in small segments. Lamina papery when dried, pale green, glabrate on both surfaces; rachis and costae brownish stramineous, sparsely shortly hairy abaxially, with subulate spines on adaxial side at base of costa or costule. Sori elliptic, 4 or 5 pairs per pinnule, inframedial on basal acroscopic veins; indusia brownish, elliptic, membranous, entire, fugacious when mature. Perispore surface without folds, with granular ornamentation. 2n = 80*.

Coniferous or mixed forests, wet areas; (1000-)2500-3900 m. Guizhou, Sichuan, Xizang, Yunnan [India (Sikkim)].


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