白头韭 bai tou jiu

Replaced synonym: Allium flavovirens Regel, Trudy Imp. S.-Peterburgsk. Bot. Sada 10(1): 344 (-345). 1887 (as "flavo-virens")

Bulb solitary or paired, subcylindric, 0.6--1.3 cm in diam.; tunic dark yellowish brown, reticulate. Leaves shorter than scape, (1--)2--5 mm wide, semiterete, fistulose, adaxially channeled, smooth. Scape 20--50(--60) cm, terete, covered with leaf sheaths for ca. 1/3 its length. Spathe 2-valved, persistent. Umbel globose, densely many flowered. Pedicels subequal, slightly less than to 1.5 × as long as perianth, bracteolate. Perianth white or slightly tinged with yellow; inner segments oblong-ovate, 3.5--5.5 × 1.4--2 mm. Filaments equal, slightly longer than to 2 × as long as perianth segments, connate at base and adnate to perianth segments; outer ones subulate; inner ones broadened at base, 1-toothed on each side, teeth sometimes irregularly 2--4-denticulate at apex. Ovary obovoid, with concave nectaries at base. Style exserted. Fl. and fr. Jul--Aug. 2 n = 16*, 32.

Sandy places. Gansu, Heilongjiang, Nei Mongol [Mongolia, Russia].