Early Blue Violet, Hookedspur Violet, Long-spurred Violet, Western Longspur Violet: Viola adunca (Synonynms: Viola adunca ssp. adunca, Viola adunca ssp. oxyceras, Viola adunca var. adunca, Viola adunca var. bellidifolia, Viola adunca var. cascadensis,Viola adunca var. oxyceras, Viola adunca var. uncinulata, Viola bellidifolia, Viola cascadensis) - Flowers purple or violet, often with white throat with purple pencilling. Spur behind petals is slender & 1/2 the length of the lowest petal. Leaves lance-shaped.
Cultivated Pansy, European Field Pansy, Small Wild Pansy: Viola arvensis (Synonym: Viola tricolor var. arvensis) - Non-native.
Baker Violet, Baker's Violet, Yellow Prairie Violet: Viola bakeri (Synonyms: Viola nuttallii, Viola nuttallii var. bakeri) -
Beckwith's Violet: Viola beckwithii (Synonym: Viola beckwithii var. beckwithii) - ?
Canada Violet, Canadian White Violet, Rugose Violet: Viola canadensis var. rugulosa (Synonyms: Viola canadensis ssp. rydbergii, Viola rugulosa) -
Wedge-leaf Violet: Viola cuneata -
Douglas Violet, Golden Violet: Viola douglasii -
Flett's Violet, Olympic Violet: Viola flettii -
Pioneer Violet, Stream Violet : Viola glabella - Yellow flowers with 5 petals of different shapes. The lower petal has lines on it. Leaves are heart-shaped. Herbaceous wildflower to 6 inches tall.
Hall's Violet, Oregon Violet: Viola hallii -
Howell's Violet: Viola howellii -
Lance-leaved Violet: Viola lanceolata (Synonym: Viola lanceolata ssp. lanceolata) -
Alaska Violet, Aleutian Violet, Langsdorf's Violet: Viola langsdorfii (Synonyms: Viola simulata, Viola superba) -
Northern Pine Violet: Viola lobata ssp. integrifolia (Synonym: Viola lobata var. integrifolia) -
Pine Violet: Viola lobata ssp. lobata (Synonyms: Viola lobata var. lobata, Viola psychodes) -
Small White Violet: Viola mackloskeyi (Synonyms: Viola macloskeyi ssp. macloskeyi, Viola macloskeyi ssp. pallens, Viola macloskeyi var. macloskeyi, Viola macloskeyi var. pallens) -
LeConte Violet, Northern Bog Violet: Viola nephrophylla (Synonyms: Viola nephrophylla var. cognata, Viola nephrophylla var. nephrophylla, Viola sororia, Viola sororia ssp. affinis, Viola sororia var. affinis) -
Pinto Violet, Western Heart's Ease: Viola ocellata - Non-native.
Sweet Violet, Sweet Blue Violet: Viola odorata - Non-native.
Darkwoods Violet, Evergreen Yellow Violet, Round-leaf Violet, Round-leaved Violet: Viola orbiculata (Synonyms: Viola sempervirens var. orbiculata, Viola sempervirens var. orbiculoides) - Flowers yellow. Leaves thin, heart shaped, but about as broad as long with rounded tips. No purple flecks appear on the leaf surface. The leaves do not persist through the winter.
Marsh Violet: Viola palustris (Synonyms: Viola palustris var. brevipes, Viola palustris var. palustris) - Flowers white to lavendar with green to lilac-tinged purple lines on the lower 3 petals. Leaves oval or kidney-shaped to broadly heart-shaped, 2.5-3.5 cm wide. Flowers and leaves arise independently from the rhizome. Common in moist meadows and along streams.
Rain Violet: Viola pluviae - Non-native.
Upland Yellow Violet, Wavyleaf Violet: Viola praemorsa ssp. linguifolia (Synonyms: Viola flavovirens, Viola nuttallii var. major, Viola praemorsa ssp. flavovirens, Viola praemorsa ssp. major, Viola praemorsa ssp. oregona, Viola praemorsa ssp. linguifolia, Viola vallicola var. major) -
Canary Violet, Upland Yellow Violet: Viola praemorsa ssp. praemorsa (Synonyms: Viola nuttallii ssp. praemorsa, Viola nuttallii var. praemorsa, Viola praemorsa var. praemorsa) -
Goosefoot Violet, Mountain Violet: Viola purpurea ssp. integrifolia (Synonym: Viola purpurea var. integrifolia ) -
Western Bog Violet: Viola primulifolia ssp. occidentalis (Synonyms: Viola lanceolata ssp. occidentalis, Viola occidentalis, Viola primulifolia var. occidentalis) -
Goosefoot Violet: Viola purpurea ssp. purpurea (Synonyms: Viola purpurea ssp. dimorpha, Viola purpurea var. purpurea) -
Oak Woods Violet: Viola quercetorum (Synonym: Viola purpurea ssp. quercetorum) -
Goosefoot Violet, Goosefoot Yellow Violet, Purplish Violet: Viola purpurea ssp. venosa (Synonyms: Viola purpurea ssp. geophyta, Viola purpurea var. venosa) -
Dog Violet, Wood Violet: Viola riviniana - Non-native.
Evergreen Violet, Redwood Violet, Redwoods Violet: Viola sempervirens -
Cutleaf Violet, Fan Violet, Shelton's Violet: Viola sheltonii (Synonym: Viola biternata) -
Northern Bog Violet: Viola sororia ssp. affinis (Synonym: Viola nephrophylla var. nephrophylla) -
Johnny Jumpup, Wild Pansy: Viola tricolor ssp. tricolor - Non-native.
Pansy: Viola xwittrockiana - Non-native.