39. Parnassia cooperi W. E. Evans, Notes Roy. Bot. Gard. Edinburgh. 13: 172. 1921.
指裂梅花草 zhi lie mei hua cao
Stems 1-4, 14-19 cm, with 1 leaf distally. Basal leaves 2 or 3; petiole 5-9 cm; leaf blade abaxially greenish, adaxially brown-green, reniform or ovate-cordate, 1.6-3.5 × 2.5-4 cm, arcuate 7-9-veined, base deeply cordate, apex rounded, obtusely apiculate. Cauline leaf sessile, semiamplexicaul, ovate-cordate, 1.2-2.9 × 1-2.5 cm, base deeply cordate, sometimes with a few rusty brown appendages. Flower 2.5-5 cm in diam.; hypanthium shallowly campanulate. Sepals adaxially purple punctate, ovate-lanceolate or lanceolate, 6-7 × 2.5 mm, midvein distinct abaxially, margin entire, apex rounded. Petals white or yellowish green, narrowly lanceolate, 1.2-1.5 cm × (2-)3-3.8 mm, 3-veined, base with a distinct claw 2.5-4 mm, margin sparsely long fimbriate, apex acuminate. Anthers oblong, ca. 1.2 mm; filaments 6-7 mm; staminodes flat, stalk ca. 1.8 × 1.1 mm, lamina 3-lobed, lateral lobes lanceolate, to 1.5 mm, 2-3 × as long as central lobe. Ovary superior; style ca. 1.8 mm; stigma 3-lobed. Capsule obconical-ovoid, trigonous, 3-valved. Seeds black-brown, glossy, oblong. Fl. Jul-Aug, fr. Sep.
Tsuga forests on slopes, sandy banks; 2400-2800 m. SE Xizang (Mêdog Xian) [Bhutan, Sikkim].