脱萼鸦跖花 tuo e ya zhi hua

Oxygraphis delavayi var. nyingchiensis W. L. Zheng.

Basal leaves 3--5, glabrous; petiole 1.6--10 cm, vaginate at base; leaf blade reniform to orbicular or ovate-orbicular, 0.8--3.8 × 0.9--3.8 cm, base cordate or subcordate, margin crenate, indistinctly 7--9-lobed or 3-lobed, rarely 3-partite, apex rounded. Scapes 1--3, more than 4 cm, elongating to 15 cm in fruit, glabrous, except for appressed puberulent apical part. Flowers solitary or 2 or 3 in a monochasium, 1--2 cm in diam.; bracts linear or ovate. Sepals 5, oblong, ovate-oblong, or sublinear, 4--8 mm, papery, glabrous, deciduous. Petals 5--10, long elliptic or oblong, 4.5--10 × 1.8--4 mm, apex rounded. Anthers oblong; 0.6--0.9 mm. Aggregate fruit broadly ovoid, ca. 5 mm in diam.; achenes obliquely obovate or narrowly obliquely ovate, 1.8--2 × 1--1.1 mm, glabrous. Persistent style 0.5--0.8 mm, Fl. Apr--Aug, fr. Jul--Aug. 2n = 16*.

* Alpine meadows, grassy slopes, gravelly places; 3500--5000 m. NW Sichuan, SE Xizang (Bomi Xian), NW Yunnan.