Viola rotundifolia round-leaved yellow violet Violaceae VIRO; Bx, pb; 

Viola rotundifolia.Thomas G. Barnes @ USDA-NRCS PLANTS Database.Barnes, T.G., and S.W. Francis. 2004. Wildflowers and ferns of Kentucky. University Press of Kentucky

Viola rotundifolia.Thomas G. Barnes @ USDA-NRCS PLANTS Database.Barnes, T.G., and S.W. Francis. 2004. Wildflowers and ferns of Kentucky. University Press of Kentucky (Accessed 5/2014).

Viola rotundifolia is a low perennial herb, colonial from a long rhizome covered with old leaf bases, otherwise stemless. 

Leaves tufted, basal, early leaves to 3 cm long, nearly as wide, broadly heart-shaped, finely blunt-toothed, stalks hairy, tending to become prostrate later, summer leaves to 12 cm, rounded with deeply lobed base, lobes overlapping. 

Flowers yellow, developing with leaves, bilaterally symmetric, 5 parted, side petals bearded, 3 lower petals with brown veins; closed flowers later in season on short, leafless stolons, sometimes partly below ground. 

Fruit a capsule to 0.8 cm, dotted with purple, seeds cream-white; blooms April-May. 

Wetland status: FAC+. 

Frequency in NYC: Very infrequent.

 Origin: Native. 

Habitat: Rich moist woods. 

Notes: Host to larvae of the great spangled fritillary butterfly, Speyeria cybele (Nymphalidae), (Pyle 1981).