Native to Europe, but found throughout the U.S. in the northern states and many southern states, as well as in Canada to Alaska and in Hawaii.
A perennial with creeping roots that allow rapid spread of the plants. Reproduction is from seeds. Plants are commonly found along roadsides and in disturbed sites, as well as wooded areas.
Very similar in appearance and flowers to hairy vetch and purple vetch. Flower heads are without the long hairs of purple vetch, and individual flowers tend to be more compact than common vetch, being about 3 times longer than wide. Flowers usually blue-violet to lavender, with from 20 to 50 flowers on a raceme. Seed pods are slightly hairy and are about ¼ inch wide and 1 inch long.
Characteristicts Important to Control:
A perennial with persistent roots. A systemic herbicide would be needed to kill all plant parts. Close mowing prior to seed maturation will help to stop the spread.