Allium columbianum (Ownbey & Mingrone) P. Peterson, Annable & Rieseberg

Allium columbianum (Ownbey & Mingrone) P. Peterson, Annable & Rieseberg. Allium columbianum, the Columbian onion, is a species of onion native to eastern Washington, northern Idaho, and the Bitterroot Mountains of western Montana. It is a perennial herb that grows on shallow, wet soils at elevations of 300–1100 m.