Oxygraphis involucrata Riedl; Ranunculus involucratus Maximowicz (1889), not Lapeyrouse (1813); R. maximowiczii Pampanini.

Herbs perennial. Roots fibrous, subequally thick. Stems 1.5--5 cm, glabrous, simple, rarely 1-branched. Basal leaves 2--4; petiole 1.6--3.8 cm, glabrous; blade 3-lobed or with 3--5(--7) rounded teeth, subreniform, oblate, or cuneate-obovate, 3--10 × 4--16 mm, leathery, glabrous, base subcordate, subtruncate, or rounded. Stem leaves 2(or 3), clustered below flower, sessile, cuneate-obovate or oblate, 3-lobed or 3-dentate, 5--12 × 5--11 mm. Flowers solitary, terminal, 1.2--1.4 cm in diam. Receptacle glabrous. Sepals 5, broadly elliptic, ca. 4.5 mm, abaxially puberulent, persistent. Petals 5, cuneate-obovate, ca. 8 × 4 mm, nectary pit without a scale, apex truncate-rounded. Stamens numerous; anthers broadly oblong. Aggregate fruit subglobose, 5--8 mm in diam. Achene ellipsoid-ovoid, ca. 2 × 1.5--2 mm, glabrous; style persistent, ca. 1 mm. Fl. Jun--Jul, fr. Jul--Aug.

* Grassy or gravelly slopes, by rivers; 4900--5700 m. SW Qinghai, SE Xinjiang, Xizang.