素功鳞毛蕨 su gong lin mao jue

Acrophorus dissectus Ching, Acta Phytotax. Sin. 21: 382. 1983.

Rhizome erect, brown, short, 2-2.5 cm in diam., woody, terminal part densely covered with dark brown scales; scales ovate-lanceolate, ca. 5 mm, membranous, acuminate. Stipes tufted, dark brown, 60-70 cm, 6-8 mm in diam. at base, densely covered with scales same as rhizome, subglabrous upward; lamina brown-green when dry, ovate, 50-60 cm, quadripinnate, papery, glabrous abaxially, sparsely covered with short nodose hairs adaxially; pinnae 9 or 10 pairs, always opposite, spreading vertically to rachis, basal pair ca. 14 cm apart to second pair, subsessile, narrowly ovate and falcate, 32-35 × 22-25 cm, tripinnatifid, base slightly narrower, apex acuminate; pinnules 12-14 pairs, basal ones opposite and shortened, alternate or opposite upward, sessile, close together, upper pinnules 1/2-2/3 as large as basiscopic ones, second pinnule of basiscopic ones on base largest, 15-17 × 5-6 cm, elliptic-lanceolate, base truncate and slightly overlapping rachis, bipinnatifid, apex acuminate; ultimate pinnules 11-13 pairs, basal pair opposite and alternate upward, sessile, spreading, distant, narrowly elliptic, 1-1.5 × 0.5-0.8 cm, base asymmetrical, upper side truncate and close to rachillae, lower side cuneate and pinnatipartite to rachillae, apex obtuse; lobes 5-7 pairs, elliptic, ca. 4 × 2 mm, lobed or undulate on both sides, apex rounded; veins obvious on abaxial surface, pinnate on lobes, veinlets simple, submarginal; rachis and rachillae stramineous, with narrow longitudinal groove adaxially, densely covered with nodose hairs at base, with 1 cordate brown scale abaxially. Sori orbicular, ca. 0.5 mm in diam., terminal on veinlet, 1-4 on each lobe; indusium brown, semicircular, membranous.

● Dense forests. Yunnan.