Allium columbianum, the Columbian onion, is a species of onion native to eastern Washington (Pend Oreille, Spokane, Lincoln and Whitman Counties), northern Idaho (Idaho, Clearwater, Latah and Kootenai Counties), and the Bitterroot Mountains of western Montana (Ravalli and Sanders Counties). It is a perennial herb[2] that grows on shallow, wet soils at elevations of 300–1100 m.[3][4]

Columbian onion
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Monocots
Order:	Asparagales
Family:	Amaryllidaceae
Subfamily:	Allioideae
Genus:	Allium
Species:	A. columbianum
Binomial name
Allium columbianum (F.M.Ownbey & L.V.Mingrone) P. M. Peterson, Annable & L.H. Rieseberg
Synonyms[1]
Allium douglasii var. columbianum F.M.Ownbey & L.V.Mingrone

Allium columbianum produces egg-shaped bulbs up to 15 mm long. Flowers are up to 10 mm across, pink to light purple with green midrib; anthers and pollen blue to gray.[3][5][6] Flowers bloom May to July.[2]

References