1. Parnassia longipetala Handel-Mazzetti, Anz. Akad. Wiss. Wien, Math.-Naturwiss. Kl. 60: 182. 1924.
长瓣梅花草 chang ban mei hua cao
Stems 1 or 2, 12-30 cm, often with 1 leaf near middle. Basal leaves usually 1, rarely 2; petiole 4-11 cm; leaf blade abaxially greenish, adaxially deep green, reniform, 3-6 × 5-9.5 cm, inconspicuously arcuate veined abaxially, base deeply cordate, apex rounded. Cauline leaf sessile, reniform, 0.8-2 × 1.5-3.5 cm, base sometimes with a few rusty brown, hairlike appendages. Flower 2.5-3.2 cm in diam.; hypanthium turbinate. Sepals semiorbicular or ovate, 4-6 × 2-4 mm, margin serrulate, apex obtuse. Petals green, lanceolate or narrowly oblong-lanceolate, (1-)1.5-2.5 cm × 4-5.5 mm, base cuneate into a claw 2-2.5 mm, margin densely serrulate or shortly fimbriate, apex acute. Anthers oblong, ca. 1.2 mm; filaments 5-6 mm; staminodes dark purple, terete, discoid, 3.5-4 mm, shorter than stamens, stalk ca. 2 × 1 mm, apex of lamina rounded, entire, occasionally indistinctly dentate. Ovary superior, depressed globose, with 3 or 4 slightly thickened angles; style ca. 1.5 mm; stigma 3-lobed, lobes spreading, obovate. Capsule depressed globose. Seeds brown, glossy, oblong. Fl. Jul, fr. Aug.
* Tsuga forests, forest margins, Rhododendron scrub, alpine meadows; 2400-3900 m. SE Xizang, NW Yunnan.