vkingdom Plantae - plants » divisio Magnoliophyta - flowering plants » class Rosopsida - eudicots » order Malpighiales » family Violaceae » tribus Violeae > genus Viola > Viola sect. Chamaemelanium Ging. > subsect. Chrysanthae W. Becker
Viola trinervata (T.J. Howell) T.J. Howell ex Gray - Rainier Violet
(synonyms: Viola beckwithii var. trinervata Howell)
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Distributional Range: Native Northern America NORTHWESTERN U.S.A.: United States [Oregon, Washington]
Ecology —Sagebrush flats, dry, rocky hillsides, usually in gravelly soil; 400–1200 m; Oreg., Wash.
In some populations of Viola trinervata the lower three petals are white with a yellow area proximally (V. B. Baird 1942).
References:
Hitchcock, C. L. et al. 1955-1969. Vascular plants of the Pacific Northwest.
Huxley, A., ed. 1992. The new Royal Horticultural Society dictionary of gardening
Liberty Hyde Bailey Hortorium. 1976. Hortus third.