Allium simillimum, the simil onion, or dwarf onion, is a plant species native to Idaho and Montana (Gallatin and Ravalli Counties). It grows on sandy soils at high elevations in the mountains, 1800–3400 m.Flora of North America v 26 p 268, Allium simillimumBONAP (Biota of North America Program) floristic synthesis, Allium simillimumDwarf Onion — Allium simillimum. Montana Field Guide. Montana Natural Heritage Program.
Allium simillimum produces egg-shaped bulbs up to 1.7 cm long. Flowering stalks are rarely more than 5 cm tall. Flowers are bell-shaped, up to 10 mm across; tepals white with green or pink midribs; anthers purple; pollen white or gray.Henderson, Louis Forniquet. 1900. Bulletin of the Torrey Botanical Club 27(6): 355–356.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.
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