Distribution: Occurring east of the Cascades crest in Washington; north-central Washington to southeastern Oregon.
Habitat: Sagebrush flats and rocky hillsides, often on lithosol, where vernally moist.
Flowers: March-June
Origin: Native
Growth Duration: Perennial
Conservation Status: Not of concern
Pollination: Bumblebees, bees, flies
Glabrous, somewhat glaucous perennial from short, thick, very deep-seated rhizomes, the stems several, naked below, 5-15 cm. tall.
Leaf blades palmately lobed or compound, the main segments once or twice dissected, the ultimate segments narrowly elliptic, 1.5-4 cm. long; leaves leathery, prominently 3-nerved on the lower surface; petioles longer than the blades.
Peduncles exceeding the leaves; flowers about 1.5 cm. long, usually bicolored, the upper pair deep reddish-violet, the lower 3 pale to deep lilac, with yellowish or whitish base and purple penciling, occasionally all white or all deep purple; style head hairy.
Fruit a 3-valved capsule, ovary superior, placentation parietal.
PNW Herbaria: Specimen records of Viola trinervata in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Viola trinervata checklist entry
OregonFlora: Viola trinervata information
E-Flora BC: Viola trinervata atlas page
CalPhotos: Viola trinervata photos