Description from Flora of China
Drynaria rivalis (Mettenius ex Baker) Christ var. yunnanensis Christ.
Rhizome 1-2 cm in diam., with many old persistent stipes, creeping; scales soft, tufted, basifixed, 4-10 × 0.5-1 mm, base auriculate, margin biserrate; fronds dimorphic; basal fronds sessile, ovate to oblong, 6-13(-17) × 4-10 cm, base auriculate, pinnatilobed up to 2/3 or more, lobes 5-7 pairs, margin slightly dentate; foliage fronds stalked, stipe 3-9 cm, winged; lamina pinnatifid, 25-45 × 12-18 cm, apex aborted or not; pinnae 7-13(-17) pairs, spreading, lanceolate, (5-)7.5-12(-14) × 1.5-2 (-3.5) cm, margin shallowly dentate, glabrous or with few hairs, apex acute; lamina sparsely hairy on both surfaces, especially along costa and veins. Sori in 1 straight row between costa and margin, close to costa, 1 row between lateral veins. Sporangia often with glandular hairs. Spores verrucate.
Epiphytic or epilithic; 1000-1900(-4200) m. S Gansu, Qinghai, Shaanxi, Sichuan, E Xizang, NW Yunnan [Bhutan, Myanmar].