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.
Blue or Tufted Vetch: Cat Peas: Tinegrass. Vicia Cracca.
Pulse Family. June - Aug.
Found in fields, waste land. Newfoundland to New Jersey, westward to Kentucky, Iowa and Minnesota.
Small, violet-blue, closely set on a 1-sided spike. Fruit a small pod.
Tendril-bearing, divided into 18 - 24 narrow leaflets with bristle-like points.

Cow Vetch.
Tare or Pea Vine.
V. americana. Flowers 3-9, slightly larger than those of the preceding. Leaflets 8-14, blunt; distinctly veined. Found in moist places. New York to Virginia and westward.
 
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