毛叶桫椤 mao ye suo luo

Cyathea andersonii (J. Scott ex Beddome) Copeland; Gymnosphaera andersonii (J. Scott ex Beddome) Ching & S. K. Wu.

Trunk erect, 6-10 m. Fronds 2-pinnate-pinnatifid, 2-3 m; stipe dark, almost black, with sparse scattered scales and ± scabrous; scales dark, lanceolate, margin with pale fringes; rachis dark purple, abaxial side sparsely hirsute; pinnae up to 70 cm; largest pinnule 12-14 × 2.5-3(-4) cm, often with a lower free basal segment, other part pinnatifid to 1-2 mm to costule; veins 10-12 pairs, simple or forked; pinnule segments slightly falcate, subentire, apex obtuse, serrulate; both sides of costule, midvein, and veinlets with spreading gray stiff hairs ca. 0.5 mm; small scales often at base of costules. Sori close to midveins of fertile pinnule segments; paraphyses gray, longer than sporangia; indusia absent.

Margins of montane rain forests; 700-1200 m. SE Xizang, S and SW Yunnan [Bhutan, NE India].