woolly blue violet (Viola sororia) — identification, habitat & look-alikes

Woolly blue violet is a low-growing perennial that blooms in woods and lawns in the eastern and central United States in spring. Look for purple flowers above a cluster of heart-shaped leaves; the leaves may be hairy or nearly smooth. Woolly blue violet is also called common blue violet.

Appearance

Growth form: A low, stemless perennial about 4 in (10 cm) tall, forming clumps that spread over time.
Leaves: Heart-shaped leaves can reach about 3 in (8 cm) long. They may be noticeably hairy or nearly smooth, so hair alone is not enough for identification.
Flowers: Flowers are usually blue-violet with a white center. The two side petals have small tufts of hairs.
Flowering time: Blooms from mid- to late spring for about 4–6 weeks.

Look-alikes

common blue violetViola communis

Common blue violet (Viola communis) usually has shinier leaves; woolly blue violet usually has duller leaves. Leaf hair varies, so a single leaf photo may not settle the difference.

Why they get mixed upBoth have low clusters of heart-shaped leaves and purple flowers, and some guides use the same common name for both.

blue marsh violetViola cucullata

In Missouri, blue marsh violet often holds its open flowers above the leaves, while woolly blue violet usually holds flowers about leaf height. A single flower photo can still be hard to place.

Why they get mixed upBoth are purple, stemless violets in the eastern US.

sweet violetViola odorata

Sweet violet usually spreads with visible runners and has fragrant flowers. Woolly blue violet forms clumps without those surface runners.

Why they get mixed upBoth can appear in US gardens and have rounded leaves.

Where it lives

Typical habitats: Woodlands
Woodland edges
Prairies
Lawns
Parks
Range: Native across much of the eastern and central US and nearby Canada. It is common in woods, thickets, moist edges, and lawns.
Preferred conditions: Prefers partial sun or light shade and moist soil rich in organic matter, but adapts well to lawns.

Life cycle

Reproduction: Besides its spring blooms, the plant makes small flowers that never open and pollinate themselves to set seed.
Seed dispersal: Ripe three-part seed capsules can fling seeds away from the plant.

Name and classification

About the name: The white-and-purple Confederate violet (Viola communis priceana) was once called Viola sororia priceana.

Conservation

IUCN Red List: NENot EvaluatedNot yet assessed

Culture and stories

Culture and stories: Rhode Island names this species as its state flower.

17 sources