线叶书带蕨 xian ye shu dai jue

Vittaria linearifolia Ching, Sinensia 1: 183. 1931.

Rhizome shortly creeping; scales light brown, bright iridescent, lanceolate, ca. 10 mm, ca. 1.5 mm wide at base, twisted, margin denticulate. Fronds clustered; stipe shorter, slender, glabrous, light brown at base; lamina thickly leathery, linear, 20-50 × 0.2-0.4 cm, margin strongly revolute; costa invisible adaxially, raised abaxially, flattened, very broad, up to half of width of lamina. Soral line deeply immersed in groove, very close to costa; paraphyses long, with head obconic, as long as or slightly shorter than wide. Spores monolete, oblong in outline, surface ornamentation obscure.

Epiphytic or epilithic; 1700-3400 m. SE Xizang, NW and W Yunnan [India (Assam), N Myanmar].