This section is from the book "How To Know The Wild Flowers", by Frances Theodora (William Starr Dana). Also available from Amazon: How To Know The Wild Flowers.
Stems. - Branched, one to six feet long, prostrate or climbing. Leaves. - Divided into three leaflets, which are more or less prominently lobed toward the base, the terminal two-lobed; or some or all without lobes. Flowers. - Purplish or greenish, on long flower-stalks. Pod. - Linear, straight, or nearly so.
This somewhat inconspicuous plant is found back of the sandhills along the coast, often in the neighborhood of the beach pea, and climbing over river-banks, thickets, and fences as well. It can usually be identified by its oddly lobed leaflets.
 
Continue to: