Foliage glabrous, succulent, frequently in dense tufts from stout or matted rootstocks. Leaf blades at flowering time narrowly ovate or triangular, slightly heart-shaped; the later ones broadly ovate or deltoid, 1 to 3 inches wide, often as broad as long, the base truncate or slightly heart-shaped, coarsely toothed or incised toward the base. Flowering scapes usually longer than the leaves; flowers violet-blue, the petals often notched at the ends.
Memoir 15 N. Y. State Museum
A. Triangle-Leaved Violet - Viola emarginata
Viola emarginataacuti 1 o b a Brainerd, found on Staten Island, possesses leaf blades (of mature leaves) which are five-cleft or five-parted, the middle lobe long and narrow, the lateral ones shorter and narrower than the middle lobe.
Closely related to the Triangle-leaved Violet is the Cut-leaved Violet (Viola pectinata Bicknell) in which the blades of the mature leaves are ovate-deltoid, wider than long, the margin deeply dentate or pectinate with numerous small linear acute, entire lobes. Low meadows and edges of salt meadows near the coast.