Allium prostratum Trevir.

Bulb solitary or paired, subcylindric, 0.5--1 cm in diam., attached to a horizontal, robust rhizome; tunic light brown, sometimes tinged with black, subleathery, apex usually entire, sometimes laciniate. Leaves shorter than scape, 0.7--1.5 mm wide, semiterete, adaxially channeled, margin scabrous. Scape 10--25 cm, terete, covered with leaf sheaths only at base. Spathe 1-valved, persistent. Umbel hemispheric. Pedicels subequal, 2--3 × as long as perianth, bracteolate or ebracteolate. Perianth pale purple to purple-red; outer segments ovate, 3.2--5 × 1.8--2.9 mm; inner ones oblong to oblong-ovate, 4--5.5 × 2.2--3.2 mm, apex obtuse, distal margin and apex irregularly crenulate. Filaments equal, equaling to slightly longer than perianth segments, connate at base and adnate to perianth segments; outer ones subulate; inner ones narrowly triangular-subulate, 2--3 × as wide as outer ones. Ovary obovoid, minutely tuberculate, without concave nectaries at base. Style exserted. Fl. and fr. Jul--Aug.

Stony slopes, steppes. N Nei Mongol (Hulun Buir, Manzhouli Shi), N Xinjiang (Tacheng Xian, Toli Xian) [Mongolia, Russia].

Allium congestum G. Don; A. declinatum Willdenow; A. deflexum Fischer ex Schultes & J. H. Schultes; A. fischeri Besser ex Schultes & J. H. Schultes; A. satoanum Kitagawa.

Allium prostratum is an Asian species of wild onion native to Siberia (Zabaykalsky Krai, Buryatia, Yakutia), Mongolia, Inner Mongolia, and Xinjiang. It grows in sunlit locations on steppes and rocky slopes.

Allium prostratum spreads by means of a robust horizontal rhizome. It produces 1 or 2 bulbs up to 10 mm in diameter. Scape is up to 25 cm tall. Leaves are tubular, shorter than the scape. Umbel is hemispheric, with purple flowers.