19. Potentilla glabriuscula (T. T. Yü & C. L. Li) Soják, Candollea. 43: 453. 1988.
光叶委陵菜 guang ye wei ling cai
Herbs perennial, low. Roots robust, terete; lateral roots filiform. Flowering stems erect, 1–2.5 cm tall, pilose. Radical leaves 1.5–5 cm including petiole; stipules brown, membranous, abaxially subglabrous, auricles connate from base to apex, apex rounded; petiole subglabrous; leaf blade pinnate with 3–7 pairs of leaflets; leaflets shortly petiolulate or subsessile, oblong to narrowly obovate, 3–5 × 2–4 mm, subglabrous, margin 3–7-serrate, apex acute; cauline leaves 1(or 2), or reduced and bractlike. Flower solitary, 6–12 mm in diam. Sepals elliptic to ovate, apex rounded; epicalyx segments oblong-lanceolate, nearly equaling sepals, abaxially sparsely pubescent or subglabrous, apex obtuse or acute. Petals yellow, oblong to elliptic, 6–8 × 4–5 mm, apex rounded. Stamens 5–10. Style lateral. Achenes not seen. Fl. and fr. Jun–Oct.
Forest margins, alpine meadows; 2500--5500 m. E and S Xizang, NW Yunnan [Bhutan, N Myanmar, E Nepal, Sikkim].
Two varieties occur in China. Two of us (Ohba and Ikeda) believe that var. majuscula Soják, described from Sikkim, is synonymous with var. glabriuscula, but we have not seen the type.