39. Potentilla sischanensis Bunge ex Lehmann, Nov. Stirp. Pug. 9: 3. 1851.
西山委陵菜 xi shan wei ling cai
Herbs perennial. Roots robust, terete, woody. Flowering stems tufted or not, erect, ascending, or spreading, 10–30 cm tall, together with petioles white tomentose and sparsely villous, glabrescent when old. Radical leaves 3–25(–30) cm including petiole; stipules brown, membranous, abaxially white villous; leaf blade pinnate with 3–5(–8) pairs of leaflets; leaflets opposite, rarely proximal ones alternate, at intervals of 0.5–1.8 cm, adaxially green, ovate, oblong-elliptic, or lanceolate, 0.5–3 × 0.4–1.5 cm, subleathery, abaxially densely white tomentose, appressed white villous and tomentose on veins, adaxially sparsely villous, margin flat or slightly revolute, pinnately parted or serrate-lobed, apex obtuse or acute; segments oblong-elliptic, lanceolate, or ovate-lanceolate, or lobes triangular or triangular-ovate; cauline leaves absent or undeveloped, bractlike, and palmately or pinnately 3–5-sect; stipules green, ovate-lanceolate, subleathery, abaxially densely white tomentose. Inflorescence laxly cymose. Flowers 0.8–1 cm in diam.; pedicel 1–1.5 cm, sparsely pilose, with small, opposite bracteoles. Sepals ovate-lanceolate or triangular-ovate, apex acuminate; epicalyx segments linear-lanceolate, shorter than or nearly equaling sepals, white tomentose and abaxially sparsely pilose. Petals yellow, obovate, 0.5–1 × as long as sepals, apex rounded or emarginate. Style subterminal, base slightly thickened; stigma slightly dilated. Achenes ovoid, rugose at maturity. Fl. and fr. Apr–Aug.
Thickets, grasslands, grassy or dry mountain slopes, ravines, loess hills, waste places; 200--3600 m. Gansu, Hebei, Nei Mongol, Ningxia, Qinghai, Shaanxi, Shanxi, Sichuan [Mongolia].