violets (Viola) — identification, habitat & look-alikes

Violets are mostly low-growing plants found in lawns, woodlands, and meadows across the United States. A typical violet flower has five petals and a small nectar-holding projection behind the lowest petal. To tell species apart, look at leaf shape, hairs on the side petals, and whether leaves grow on an aboveground stem rather than relying on flower color alone.

In this group

woolly blue violetViola sororia

This native eastern and midwestern lawn violet has heart-shaped leaves and blue-purple, white, or mixed-color flowers in spring.

arrowleaf violetViola sagittata

This native violet favors dry open soil in much of the East; its mature leaves are longer and more arrow-shaped than those of common blue violet.

wild pansyViola tricolor

This European garden plant has purple, yellow, and white flowers and occasionally escapes into lawns, fields, and disturbed places.

Appearance

Growth form: Most are low-growing, nonwoody plants, and many live for several years. Some spread by or runners and can form patches.
Flowers: Flowers may be violet, blue, white, yellow, or multicolored. Dark guide lines, petal hairs, and shape often matter more than the main color.
Flowering time: Many U.S. violets bloom in spring. In Missouri, most species flower between March and May.
Fruit: The dry seed pod splits into three sections when ripe.
How to recognize it: A typical violet flower has five petals, with its left and right sides mirroring each other, and a spur behind the lowest petal. Check leaf shape, whether leaves grow on an aboveground stem, and whether the side petals have hairs.

Look-alikes

wood-sorrelsOxalis

Violet leaves are each one piece, and their flowers are uneven, with a spur at the back. Most wood-sorrels have leaves made of three separate heart-shaped leaflets and evenly shaped five-petaled flowers without a spur.

Why they get mixed upSome wood-sorrels are low plants with pink or purple flowers.

Where it lives

Typical habitats: lawns
woodland floors
meadows
garden edges
Range: Viola occurs across the United States in many habitats. Common blue violet is native and widespread in the East and Midwest, while sweet violet is grown in gardens and escapes in some regions.
Preferred conditions: Different species favor moist shade, dry open soil, wetlands, or gardens. Habitat and region are useful clues because flower color alone is rarely enough.
Flowering: Flowers Mar–May
Flowers Mar–May

Life cycle

Reproduction: Many violets make showy spring flowers and later that stay closed and self-pollinate.
Seed dispersal: Ripe seed pods can fling seeds away from the parent, and ants carry seeds that have a nutritious outer attachment.

Name and classification

Group name: Violets usually refers to the genus Viola, which also includes pansies and Johnny-jump-ups.

Culture and stories

Culture and stories: Common blue violet can be welcomed as a native groundcover even though it is also treated as a lawn weed.

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