Allium unifolium

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one-leaf onion
Allium unifolium.jpg
Scientific classification e
Kingdom: Plantae
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Amaryllidaceae
Subfamily: Allioideae
Genus: Allium
Species: A. unifolium
Binomial name
Allium unifolium
  • Allium grandisceptrum Davidson
  • Allium unifolium Vieill. ex Greene
  • Allium unifolium var. lacteum Greene

Allium unifolium, the one-leaf onion, is a species of wild onion. It is native to the coastal mountain ranges of California and Oregon, from San Luis Obispo County north to Yamhill County. It grows on clay soils including serpentine, at elevations up to 1100 m.[3]

Allium unifolium, despite its name, usually has 2-3 flat leaves up to 50 cm long. Bulbs, though, are usually solitary, egg-shaped, up to 2 cm long, often formed at the end of rhizomes spreading out from the parent plant. Scapes are round in cross-section, up to 80 cm tall. Flowers are up to 15 mm across; tepals usually pink but occasionally white; anthers yellow or purple.[3][4][5][6]


  1. ^ Tropicos
  2. ^ The Plant List
  3. ^ a b Flora of North America, v 26 p 258
  4. ^ Hickman, J. C. 1993. The Jepson Manual: Higher Plants of California 1–1400. University of California Press, Berkeley.
  5. ^ Kellogg, Albert. 1863. Proceedings of the California Academy of Sciences 2: 112, f. 35.
  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.

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