Burke: Viola nephrophylla vs. Viola trinervata

	Viola nephrophylla	Viola trinervata
	LeConte violet, northern bog violet	desert pansy, 3-nerved violet, sagebrush violet
Habit	Glabrous, acaulescent perennial with shallow, fleshy, spreading rhizomes.	Glabrous, somewhat glaucous perennial from short, thick, very deep-seated rhizomes, the stems several, naked below, 5-15 cm. tall.
Leaves	Leaf blades deeply ovate-cordate to cordate-triangular, up to 7 cm. in width, with rounded teeth; petioles 5-25 cm. long; stipules linear-lanceolate, entire.	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.
Flowers	Flowers solitary, 10-20 mm. long, on peduncles usually exceeding the leaves; spur short, saccate; petals 5, bluish-violet, the lower 3 whitish at the base, prominently bearded, the upper pair sometimes not bearded; style glabrous.	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.
Fruits	Capsule, 3-valved.	Fruit a 3-valved capsule, ovary superior, placentation parietal.

	Viola nephrophylla	Viola trinervata
Flowering time	May-July	March-June
Habitat	Moist places, especially in meadows and along streams.	Sagebrush flats and rocky hillsides, often on lithosol, where vernally moist.
Distribution	Occurring chiefly east of the Cascades crest in Washington; Yukon Territory to California, east across most of North America to the Atlantic Coast. [WildflowerSearch map] [BONAP county map]	Occurring east of the Cascades crest in Washington; north-central Washington to southeastern Oregon. [WildflowerSearch map] [BONAP county map]
Origin	Native	Native
Conservation status	Not of concern	Not of concern
Sibling taxa	V. adunca, V. arvensis, V. canadensis, V. flettii, V. glabella, V. howellii, V. lanceolata, V. langsdorffii, V. macloskeyi, V. nuttallii, V. odorata, V. orbiculata, V. palustris, V. pluviae, V. purpurea, V. renifolia, V. riviniana, V. selkirkii, V. sempervirens, V. sheltonii, V. sororia, V. tricolor, V. trinervata, V. ×wittrockiana	V. adunca, V. arvensis, V. canadensis, V. flettii, V. glabella, V. howellii, V. lanceolata, V. langsdorffii, V. macloskeyi, V. nephrophylla, V. nuttallii, V. odorata, V. orbiculata, V. palustris, V. pluviae, V. purpurea, V. renifolia, V. riviniana, V. selkirkii, V. sempervirens, V. sheltonii, V. sororia, V. tricolor, V. ×wittrockiana
Web links	Local floras: BC, CA, OR, WA Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search	Local floras: OR, WA Local Web sites: Flora NW, PNW Herbaria, Turner Photog. WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Viola trinervata

LeConte violet, northern bog violet

desert pansy, 3-nerved violet, sagebrush violet

Habit

Glabrous, acaulescent perennial with shallow, fleshy, spreading rhizomes.

Glabrous, somewhat glaucous perennial from short, thick, very deep-seated rhizomes, the stems several, naked below, 5-15 cm. tall.

Leaves

Leaf blades deeply ovate-cordate to cordate-triangular, up to 7 cm. in width, with rounded teeth;

petioles 5-25 cm. long;

stipules linear-lanceolate, entire.

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.

Flowers

Flowers solitary, 10-20 mm. long, on peduncles usually exceeding the leaves;

spur short, saccate;

petals 5, bluish-violet, the lower 3 whitish at the base, prominently bearded, the upper pair sometimes not bearded;

style glabrous.

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.

Fruits

Capsule, 3-valved.

Fruit a 3-valved capsule, ovary superior, placentation parietal.