Allium douglasii

Douglas' Onion
Allium douglasii in Lincoln County, Washington, US

Apparently Secure  (NatureServe)[1]
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Amaryllidaceae
Subfamily: Allioideae
Genus: Allium
Species:
A. douglasii
Binomial name
Allium douglasii
Synonyms[2]

Allium hendersonii B.L.Rob. & Seaton

Allium douglasii, the Douglas' onion, is a perennial herbaceous flowering plant in the Amaryllidaceae family. It is native to northeastern Oregon, eastern Washington, and northern Idaho.

Description

Allium douglasii is a perennial herbaceous flowering plant that produces egg-shaped bulbs up to 3 cm (1+1⁄4 in) long. Scapes are round in cross-section, up to 40 cm (16 in) tall. Flowers are up to 10 mm (3⁄8 in) 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 400–1,300 m (1,300–4,300 ft) above sea level.[3][8]

Conservation

As of December 2024, 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]

References

  1. ^ a b NatureServe (6 December 2024). "Allium douglasii | NatureServe Explorer". NatureServe Explorer. Arlington, Virginia. Retrieved 22 December 2024.
  2. ^ "Allium douglasii Hook. | Plants of the World Online | Kew Science". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 22 December 2024.
  3. ^ a b Flora of North America Editorial Committee (ed.). "Allium douglasii". Flora of North America North of Mexico (FNA). New York and Oxford: Oxford University Press – via eFloras.org, Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
  4. ^ Hooker, William Jackson. 1839. Flora Boreali-Americana 2: 184, pl. 197
  5. ^ Robinson, Benjamin Lincoln, & Seaton, Henry Eliason. 1893. Botanical Gazette 18(6): 237–238.
  6. ^ 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.
  7. ^ Taylor, Ronald J. (1994) [1992]. Sagebrush Country: A Wildflower Sanctuary (rev. ed.). Missoula, MT: Mountain Press Pub. Co. p. 76. ISBN 0-87842-280-3. OCLC 25708726.
  8. ^ "Allium douglasii". County-level distribution map from the North American Plant Atlas (NAPA). Biota of North America Program (BONAP). 2014.
  9. ^ "USDA Plants Database". plants.usda.gov. Retrieved 2024-12-22.