This section is from the book "Who's Who Among The Wild Flowers", by W. I. Beecroft. Also available from Amazon: A Field Guide to Edible Wild Plants.
Viola palmata.
Violet Family. Apr. - May.
Found in dry ground, chiefly woodlands. Massachusetts to Minnesota, and southward.
Light or deep violet.
Heart-shaped, first leaves of spring sometimes undivided, later ones 5 - 9-lobed, the segments variously toothed or cleft, middle segment usually the largest.
Viola sagittata. Violet Family. Apr. - May.
Plant 2 - 8 inches high; found in wet weadows, dry borders. Massachusetts to Minnesota and southward.
Light or deep violet, upper and side divisions bearded, lower one veined.
Arrowhead-shaped, often toothless above the middle, slightly lobed below.
Running Violet. Viola conspersa. Violet Family. Apr. - June.
Plant 2 - 6 inches high, found in low, shaded ground. Eastern Quebec to Minnesota and southward.
Pale purple, sometimes white, raised above the leaves on stems from the leaf angles, pansy-fashion.
Round heart-shaped, with barely noticeable scallops. Plant stems ascending.
Purple, Meadow or Hooded Blue Violet. Viola papilionacea.
Violet Family. Apr. - June.
Plant 3 - 7 inches high, found in low ground. Massachusetts to Minnesota and southward.
Light purple, variable, divisions yellowish or white at the base.
Heart-shaped, scallop-toothed.
 
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