三出假瘤蕨 san chu jia liu jue

Polypodium trisectum Baker, Bull. Misc. Inform. Kew 1898: 232. 1898; Crypsinus hirsutus Tagawa & K. Iwatsuki; C. trisectus (Baker) Tagawa; Phymatodes trisecta (Baker) Ching; P. trisecta var. hirticarpa Ching; Phymatopsis trisecta (Baker) Ching; Phymatopteris trisecta (Baker) Pichi Sermolli; Polypodium podobasis Christ.

Rhizome 3-4 mm in diam., densely scaly throughout; scales dark brown at center, paler toward margin, ovate-lanceolate, 4-5 × 1-1.5 mm, margin ciliate, apex acuminate. Fronds monomorphic. Stipe straw-colored, 6-12 cm, hairy throughout; lamina hastate to pinnatifid, 20-25 × 15-20 cm, base broadly cuneate or cordate, margins entire or undulate. Lateral lobes 1-3 pairs, ascending, broadly lanceolate, gradually narrowed from base to acuminate apex, apical lobe longer than lateral ones, 10-20 × 2-4 cm, ± contracted at base, apex acuminate. Costa raised on both surfaces, lateral veins distinct, veinlets obscure. Lamina herbaceous, both surfaces densely pubescent. Sori orbicular, large, medial or slightly close to costa.

Terrestrial in forests; 1600-2400 m. Guizhou (Weining), Sichuan, Yunnan [Myanmar, Thailand].