无鳞毛枝蕨 wu lin mao zhi jue

Rumohra sinomiqueliana Ching, Sinensia 5: 65. 1934 ["sino-miqueliana"]; Arachniodes quadripinnata (Hayata) Serizawa subsp. fimbriata (Koidzumi) Serizawa; Dryopteris miqueliana (Maximowicz ex Franchet & Savatier) C. Christensen var. fimbriata Koidzumi; Leptorumohra sinomiqueliana (Ching) Tagawa; Polystichopsis sinomiqueliana (Ching) Tagawa.

Rhizome long creeping, with shiny castaneous lanceolate scales. Fronds 45-80 cm; stipe stramineous, 25-40 cm, 2-4 mm in diam., base with scales similar to those on rhizome, upward with a few dull brown lanceolate scales, or glabrescent; lamina 3-pinnate-pinnatifid, shiny or yellowish green when dried, deltoid-pentagonal, 23-40 × 16-30 cm, herbaceous, long acuminate toward apex, rachis glabrescent; pinnae ca. 15 pairs, alternate or lowest pair opposite, obliquely spreading; lowest pinnae ovate-lanceolate, 12-25 × 9-12 cm; primary pinnules ca. 15 pairs, stalked, deltoid-lanceolate, to 4.5 × 2 cm (basal basiscopic one largest), apex obtuse; secondary pinnules 5 or 6 pairs, oblong, ca. 1.4 × 0.6 cm, base obliquely cuneate, margin deeply pinnatifid; lobes 2-4 pairs, basal acroscopic one almost free, oblong, apex with 2 or 3 blunt teeth; upper pinnae gradually reduced; axes and main veins adaxially with pale gray unicellular acicular hairs, veins abaxially with a few appressed and narrowly lanceolate, flat-based scales. Sori small, 2-4 per ultimate segment; indusia brown, margin acicular ciliate.

Slopes in broad-leaved forests or bamboos, especially in wet places along streams, or in non-forested valleys; (1000-)1400-2000 m. Chongqing, Guizhou, Hunan, Jiangxi, WC Sichuan, NE Yunnan, Zhejiang [Japan].