Description from Flora of China
Ranunculus pensylvanicus Linnaeus var. chinensis (Bunge) Maximowicz.
Herbs perennial or annual. Roots fibrous, subequally thick. Stems 10--50 cm, densely hispid, simple or branched. Basal leaves several; petiole 4--20 cm, hispid; blade ternate, ovate in outline, 4--8 × 4--10.5 cm, papery, strigose; central leaflet stalked, rhombic or broadly rhombic, 3-partite, secondary lobes rhombic-cuneate, 2- or 3-lobed; lateral leaflets smaller, shortly stalked, oblique flabellate, unequally 2-partite. Lower stem leaves similar to basal ones, upper stem leaves smaller, shortly petiolate, 3-sect. Compound monochasium terminal, 3- to several flowered; bracts leaflike. Flowers 0.7--1.2 cm in diam. Pedicel 0.5--2 cm, strigose. Receptacle densely puberulent. Sepals 5, reflexed, elliptic-ovate, 3--5 mm, abaxially strigose. Petals 5, obovate or ovate, 5--6 × 2.8--3 mm, nectary pit covered by a scale, apex rounded. Stamens numerous; anthers oblong. Aggregate fruit ovoid-cylindric or ovoid, 6--10 × 4--6 mm; carpels numerous. Achene bilaterally compressed, obliquely obovate, 2--2.5 × 1.6--2 mm, glabrous, narrowly marginate; style persistent, ca. 0.2 mm. Fl. Apr--Sep.
Chinese material named as Ranunculus pensylvanicus Linnaeus belongs here.
By streams and rivers, wet grassy places, grassy slopes, meadows; below 3000 m. Anhui, Gansu, Guizhou, Hebei, Heilongjiang, Henan, Hubei, Hunan, Jiangsu, Jilin, Liaoning, Nei Mongol, Ningxia, E Qinghai, Shaanxi, Shandong, Shanxi, W Sichuan, Xinjiang, E Xizang, Yunnan, E Zhejiang [Bhutan, N India, Japan, Kazakhstan, Korea, Mongolia, N Pakistan, Russia (Siberia), Thailand].