Description from Flora of China
Allium oviflorum Regel; A. simethis H. Léveillé & Giraudias.
Roots rather short, thick. Bulb solitary, cylindric; tunic membranous, entire, rarely fibrous. Leaves subequaling scape, 4--10 mm wide, midvein distinct. Scape terminal, 20--60 cm, 2- or 3-angled, sometimes narrowly winged, covered with leaf sheaths only at base. Spathe 2- or 3-valved, deciduous. Umbel laxly few flowered. Pedicels subequal, 2--5 × as long as perianth, ebracteolate, apex nodding. Perianth spreading-campanulate, red-purple to purple; outer segments oblong, boat-shaped, shorter and wider than inner ones, 9--11.5 × 5--8 mm, apex truncate or retuse; inner ones narrowly ovate-oblong, 10.2--12 × 4--6 mm. Filaments subulate, equal, equaling to slightly longer than perianth segments, connate at base and adnate to perianth segments. Ovary obovoid-globose, apex sometimes 6-horned; ovules 2 per locule. Style much longer than ovary, exserted; stigma punctiform. Fl. and fr. Aug--Oct. 2 n = 14, 28.
Meadows, stream banks, damp places; 2700--4200 m. SW Gansu, S Shaanxi, SW Sichuan, S Xizang (Yadong Xian), NW Yunnan [Bhutan, Sikkim].