Stem. - Twining and climbing over bushes. Leaves. - Divided into three to seven narrowly oval leaflets. Flowers. - Papilionaceous, purplish or chocolate-color, somewhat violet-scented, closely clustered in racemes.

In late summer the dark, rich flowers of the wild bean are found in short, thick clusters among the luxuriant undergrowth and thickets of low ground. The plant is a climber, bearing edible pear-shaped tubers on underground shoots, which give it its generic name signifying a pear.