Allium aaseae
"Allium aaseae" in Southwestern Idaho
Allium aaseae in Southwestern Idaho
Scientific classification edit
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Amaryllidaceae
Subfamily: Allioideae
Genus: Allium
A. aaseae
Binomial name
Allium aaseae

Allium aaseae, the Southern Idaho onion or Aase's onion, is a plant species endemic to southwestern Idaho. It has been reported from 6 counties: Elmore, Ada, Boise, Gem, Payette and Washington.[1][2][3]

The plant is named for American botanist Hannah Caroline Aase (1883-1980), at one time professor at Washington State University in Pullman.[4]

Allium aaseae grows on sandy and gravelly sites at elevations of 800–1100 m. It has egg-shaped bulbs up to 2 cm in diameter, and pink or white bell-shaped flowers up to 10 mm long.[1][5][6][7][8]


  1. ^ a b Flora of North America v 26 p 268, Allium aaseae
  2. ^ BONAP (Biota of North America Project) floristic synthesis map, Allium aaseae
  3. ^ Mancuso, M, & RK Moseley. 1991. Field investigation of Allium aaseae (Aase's onion) on the Boise National Forest. Idaho Department of Fish and Game, Boise
  4. ^ Ownbey, M. and H. C. Aase. 1955. Cytotaxonomic studies in Allium. I. The Allium canadense alliance. Research Studies of the State College of Washington, supplement 1: 1–106.
  5. ^ Ownbey, Francis Marion. 1950. Research Studies of the State College of Washington 18(1): 38–39, f. 18.
  6. ^ Cronquist, A.J., A. H. Holmgren, N. H. Holmgren & Reveal. 1977. Vascular Plants of the Intermountain West, U.S.A. 6: 1–584. In A.J. Cronquist, A. H. Holmgren, N. H. Holmgren, J. L. Reveal & P. K. Holmgren (eds.) Intermountain Flora. Hafner Pub. Co., New York.
  7. ^ 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.
  8. ^ Smith, JF, & TV Pham. 1996. Genetic diversity of the narrow endemic Allium aaseae (Alliaceae). American Journal of Botany 83:717-726.