Allium douglasii is a perennial herbaceous flowering plant that produces egg-shaped bulbs up to 3cm (1+1⁄4in) long. Scapes are round in cross-section, up to 40cm (16in) tall. Flowers are up to 10mm (3⁄8in) across; tepals pink or purple with green midribs; anthers blue; pollen white or light gray.[3][4][5][6] Two grooved leaves usually remain during the flowering stage.[7]
Distribution and habitat
Allium douglasii is endemic to sections of the Northwestern United States (northeastern Oregon, Idaho, eastern Washington). It typically grows in shallow soils at elevations of 400–1,300m (1,300–4,300ft)above sea level.[3][8]
Conservation
As of December2024[update], the conservation group NatureServe listed Allium douglasii as Apparently Secure (G4) worldwide. This status was last reviewed on 7 August 1984. At the state level, this species is listed as No Status Rank (not assessed) in Idaho and Oregon, and as Secure (G5) in Washington.[1]
Taxonomy
Allium douglasii was first named and described by William Jackson Hooker in 1838 in the Flora Boreali-Americana publication
Etymology
The specific epithet, douglasii, is named in honour of scottish botanist David Douglas. In English, this species is commonly known as Douglas' Onion.[9]
↑ Hitchcock, C. H., A.J. Cronquist, F. M. Ownbey & J. W. Thompson. 1969. Vascular Cryptogams, Gymnosperms, and Monocotyledons. 1: 1–914. In C. L. Hitchcock, Vascular Plants of the Pacific Northwest. University of Washington Press, Seattle.
↑ Taylor, Ronald J. (1994) [1992]. Sagebrush Country: A Wildflower Sanctuary (rev.ed.). Missoula, MT: Mountain Press Pub. Co. p.76. ISBN0-87842-280-3. OCLC25708726.
↑ Kartesz, John T. (2014). "Alliumdouglasii". County-level distribution map from the North American Plant Atlas (NAPA). Biota of North America Program (BONAP).
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