| Family | VIOLACEAE |
| Genus species | Viola trinervata (Howel) Howell ex A.Gray |
| Bibliography | Bot. Gaz. 11: 290 (1886) |
| Native Range | Oregon to Washington |
| Primary Biome | Temperate |
| Habitat | sandy grassland |
| Altitude | 400-1200m |
| Description | leaves coriaceous, in outline orbiculate, pinnatipartite, segments 3-5, pinatilobate, lobes 3-veined, flowers 2cm across, lower petals with whitish base |
| Size | 5-15cm |
| Color | dark reddish violet |
| Bloom | spring |
| Ca | |
| Type | perennial |
| Cultivation | sunny site with a poor, sandy soil alpine house, sandy soil, sun |
| Propagation | seed in winter, barely covered, germ. 1-3 months, 13-16°C division after flowering and in fall |
| Synonyms | Viola beckwithii var. trinervata Howell Viola chrysantha var. glaberrima Torr. Viola trinervata f. semialba H.St.John |
| Territory | 7 Northern America 73 Northwestern U.S.A. (ORE Oregon, WAS Washington) |