Viola adunca

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Viola adunca
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Rosids
Order: Malpighiales
Family: Violaceae
Genus: Viola
Species: V. adunca
Binomial name
Viola adunca

Viola bellidifolia
Viola cascadensis

Viola adunca is a species of violet known by the common names hookedspur violet, early blue violet, sand violet, and western dog violet. It is native to North America, including the western half of the United States to New England northward throughout Canada.

The compact arrangement of 5–40 mm (0.20–1.57 in) round-ovate blunt-tipped leaves, edges generally crenulate, on 5–70 mm (0.20–2.76 in) stalks, and pale to deep violet flowers are characteristic of the species. This individual is subspecies adunca.

This is a hairy, compact plant growing from a small rhizome system. The leaves are spade- or heart-shaped, sometimes with broadly wavy margins. They are generally 1 to 4 centimeters long. The single-flowered inflorescence grows at the end of a long, very thin peduncle. The nodding flower is a violet with five purple petals, the lower three with white bases and purple veining. The upper two petals may have hooked spurs at their tips.

There are several varieties of V. adunca; a white-petaled form has been noted in Yosemite National Park.

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