Viola x primulifolia is a low perennial herb, stemless, colonial from creeping rhizomes, leafy stolons after flowering.
Leaves basal, to 12 cm long, 8 cm wide (usually much smaller), egg-shaped to oblong, tip blunt to rounded, base truncate to slightly lobed, then tapering down leaf stalk as wings, margin bluntly toothed.
Flowers white, much smaller than V. sororia, bilaterally symmetric, 5 parted, 3 lower petals with purple veins near base, stalks often longer than leaves; blooms April-June; closed, self pollinated flowers produced near leaf bases later in season.
Fruit small capsules with numerous dark seeds; seeds with a fleshy attachment, attractive to ants, which disperse them.
Wetland status: FAC+.
Frequency in NYC: Infrequent (NYS Rare S3, U).
Habitat: Open, partly shaded stream banks and woods in moist soil.