峨边鳞毛蕨 e bian lin mao jue

Acrophorus exstipellatus Ching & S. H. Wu, Acta Phytotax. Sin. 21: 383. 1983.

Plants ca. 1 m tall. Rhizome erect or ascending, short, ca. 2 cm in diam., terminal part densely covered with dark brown scales; scales ovate-lanceolate, ca. 7 mm, thickly membranous, acuminate. Stipes tufted, dark brown, stramineous upward, lustrous, ca. 63 cm, ca. 5 mm in diam. at base, densely covered with scales same as on rhizome, upward subglabrous and with scale traces after scales fallen; lamina brown-green when dry, ovate, ca. 36 cm wide, always quadripinnate, papery, glabrous or with few nodose hairs along midvein abaxially, sparsely covered with short nodose hairs adaxially, apex acuminate; pinnae 9-12 pairs, opposite, basal pairs ca. 11 cm apart, basal pair largest, with short stalk ca. 4 mm, ascending, narrowly ovate, ca. 32 × 18 cm, tripinnate, base truncate and slightly enclosing rachis, apex caudate-acuminate; primary pinnules ca. 15 pairs, nearly opposite, with short stalk 2-3 mm, 3-4.4 mm apart, spreading, base truncate and close to rachis, apex caudate-acuminate, acroscopic ones ca. 2/3 as long as basal basiscopic ones, basalmost pairs longest and ca. 13 × 3.5-4 cm; secondary pinnules ca. 15 pairs, basal ones opposite, alternate upward, subsessile, spreading, close to each other, elliptic, 1.5-2 × 0.8-1 cm, bipinnate, base truncate, close to rachillae, apex obtuse; ultimate lobes 5 or 6 pairs, spreading, slightly separated from each other, elliptic, 4-5 × 2-3 mm, base broadly cuneate, margin undulate, apex rounded; veins obvious adaxially, pinnate on lobes, veinlets often simple, submarginal; rachis and rachillae stramineous, with narrow longitudinal groove adaxially, slightly covered with yellowish brown nodose hairs at base, occasionally with 1 cordate brown ovate-lanceolate or broadly lanceolate scale. Sori orbicular, ca. 1 mm in diam., terminal on veinlet, 1 on each veinlet; indusium brown, semicircular or ovate-circular, membranous, attached at base, persistent.

● Mixed forests; ca. 2300 m. Guangdong, Sichuan.