Burke: Viola rotundifolia vs. Viola sheltonii

	Viola rotundifolia	Viola sheltonii
		fan violet, Shelton's violet
Habit		Glabrous perennial from deep-seated rhizomes, the flowering stems 5-15 cm. tall.
Leaves		Leaf blades glaucous and somewhat purplish on the lower surface, 2-5 cm. long and broad, deeply cleft into 3 main lobes and dissected into ultimate linear segments; stipules small, membranous, comb-like.
Flowers		Flowers about 12 mm. long, yellow, the upper pair of petals brownish-backed, the lower three purplish-penciled, the lateral pair sparsely bearded; style head sparsely bearded.
Fruits		Fruit a 3-valved, puberulent capsule, ovary superior, placentation parietal.

	Viola rotundifolia	Viola sheltonii
Flowering time		April-June
Habitat		Coniferous forest understory, often associated with moss-covered boulder fields with well-developed organic layer.
Distribution	[WildflowerSearch map] [BONAP county map]	Occurring on both sides of the Cascades crest in Washington; Washington to California, east to Idaho; also in Colorado. [WildflowerSearch map] [BONAP county map]
Origin		Native
Conservation status		Not of concern
Sibling taxa	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. 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. sororia, V. tricolor, V. trinervata, V. ×wittrockiana
Web links	Local Web sites: 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: CA, OR, WA Local Web sites: CalFlora, CalPhotos, 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 rotundifolia

Viola sheltonii

fan violet, Shelton's violet

Habit

Glabrous perennial from deep-seated rhizomes, the flowering stems 5-15 cm. tall.

Leaves

Leaf blades glaucous and somewhat purplish on the lower surface, 2-5 cm. long and broad, deeply cleft into 3 main lobes and dissected into ultimate linear segments;

stipules small, membranous, comb-like.

Flowers

Flowers about 12 mm. long, yellow, the upper pair of petals brownish-backed, the lower three purplish-penciled, the lateral pair sparsely bearded;

style head sparsely bearded.

Fruits

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