Description from Flora of China
Parnassia nummularia Maximowicz ex Drude.
Stems 1-4, 15-40 cm, usually with 4-8 leaves. Basal leaves 3-6, forming a rosette; petiole 5-8 cm; leaf blade abaxially greenish, adaxially deep green, reniform, 1.5-4(-5) × 2.4-6(-7) cm, arcuate 7-9-veined with veins prominent abaxially and impressed adaxially, base cordate, apex rounded, often obtusely apiculate. Cauline leaves reniform, rarely ovate-cordate, smaller than basal leaves, equal or distal ones smaller, base cordate. Flower 2-3 cm in diam.; hypanthium conspicuous. Sepals brown punctate, ovate or oblong, ca. 7 × 5 mm; parallel veined, margin entire, apex rounded-obtuse. Petals white, purple veined, purple punctate, ovate or triangular-ovate, ca. 8 mm, base attenuate, margin long fimbriate throughout with fimbriae not turgid at apex. Anthers ellipsoid, ca. 2.5 mm; filaments ca. 6.5 mm; staminodes 4-5 mm, divided proximally into 3 filiform rays with globose glands at apex. Ovary superior, depressed ovoid or ovoid-globose; style ca. 2 mm; stigma 3-lobed. Capsule depressed globose, 3- or 4-valved. Seeds brown, glossy, oblong. Fl. Aug-Sep, fr. Sep.
This species is used medicinally.
Slopes, streamsides, moist roadsides; 1100-2000 m. S Anhui (Huang Shan), W Fujian (Jianning Xian), N and W Jiangxi (Lu Shan, Wugong Shan), NW Zhejiang (Tianmu Shan) [N India, Japan].