Viola palustris

Viola palustris (marsh violet or alpine marsh violet) is a perennial forb of the genus Viola. It inhabits moist meadows, marshes, and streambanks in northern parts of North America and Eurasia.

Viola palustris is a 5 to 22 cm, glabrous herb with petioles and peduncles from slender rhizomes. The cordate to reniform leaves are 2.5 to 3.5 cm wide with coarse, shallow, blunt teeth. Petioles are 2 to 17 cm. The white to lilac flowers are 10 to 13 mm long. Peduncles are about the same length as petioles. The lower three petals have purple lines. The lateral pair are lightly bearded.