独叶草 du ye cao

Plants glabrous. Bud scales ca. 3, membranous, ovate, 4--7 mm. Petiole 5--11 cm; leaf blade abaxially pinkish green, cordate-orbicular, 3.5--7 cm wide, 5-sect; segments apically 3-lobed, lowest one unequally 2-parted, margin apically small toothed. Flowering stem 7--12 cm tall. Flowers ca. 8 mm in diam. Sepals pale green, ovate, 5--7.5 mm, apex acuminate. Stamens 2--3 mm; filaments linear, 1-veined; anthers ellipsoid, ca. 0.3 mm. Staminodes 1.6--2.1 mm. Pistils ca. 1.4 mm; ovary nearly as long as style. Achenes narrowly oblanceolate, 10--13 × ca. 2.2 mm; persistent styles 3.5--4 mm. Seeds narrowly ellipsoid, ca. 3 mm. Fl. May--Jun. 2n = 18*.

* Forests; 2700--3900 m. S Gansu, S Shaanxi (Taibai Shan), W Sichuan, NW Yunnan (Dêqên Xian).