V. sagittata., deep blue or purplish, with entire, arrow-shaped, petioled leaves, sometimes toothed and variously cut near the base, is one of our common species. The spur is short and thick; petals, rather large and finely bearded. Plant, hairy or smooth. Scapes, 4 to 9 inches high. April and May.
V. cucullata.. - Color of petals, violet blue, darker toward the center. Flowers, on peduncles taller than the petioles. Leaves, pointed, not cut. April and May.
Our commonest violet, found in the grass, in fields and meadows, in early spring. Cleistogamous blossoms present.
V. palmata. - Color, violet purple. Leaves, all from the root, the early ones roundish or heart-shaped; later ones variously lobed, often from 2 to 5 inches long, the middle division longest and widest. Petioles, rather long, hairy, as also the veinings of the leaves. Flowers, on scapes a little shorter than the petioles. Cleistogamous flowers on creeping peduncles.
Dry soil of woods and fields, Massachusetts to Minnesota and southward.