三角金毛裸蕨 san jiao jin mao luo jue

Gymnopteris sargentii Christ, Bot. Gaz. 51: 355. 1911; Notholaena sargentii (Christ) Fraser-Jenkins; Paraceterach sargentii (Christ) R. M. Tryon.

Plants small, less than 40 cm tall. Rhizomes decumbent or ascending, short, stout; scales shiny, brown, narrowly lanceolate. Fronds clustered; stipe light chestnut-colored, 5-12 cm × 1.5-2 mm, densely light brown sericeous proximally, becoming sparsely so distally; lamina adaxially brownish green, deltoid-lanceolate or oblong-lanceolate, 10-25 × 4-10 cm, 2-pinnate (apical portion 1-pinnate), leathery when dry, abaxially densely sericeous, adaxially sparsely sericeous; rachis and costae with same hairs as on lamina surface. Pinnae 8-14 pairs, inframedial pinnae alternate, lanceolate, 3.5-7 × 1-1.5 cm, stalked (stalks 3-7 mm), imparipinnate; pinnules 3-8 pairs, anatropous, ovate-deltoid or hastate, 4-5 × 3-4 mm, shortly stalked, base cordate, apex obtuse; terminal pinnule as lateral ones but with longer stalk and often inequilateral. Veins obscure. Sori covered with hairs.

● Rocky slopes, among shrubs in dry valleys; 1900-3300 m. W Sichuan, Xizang, NW Yunnan.