What plant is that?

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Photo credits: © Francis R. Underwood 2018

The mystery plant for April 2018 is a twining herbaceous vine with pinnately compound leaves of 3 leaflets and flowers with colorful pale purple petals. This plant has two types of flowers; the visible flowers are above ground and the second type of flowers grow underground and produce small edible fruit.  The fruits produced along the above ground stem have 3 seeds and the underground fruits have only 1 seed.  This plant blooms from mid-July through mid- September.

It’s. . .

Botanical Name:		Amphicarpaea bracteata
Common Name:		Hog Peanut
Family:		Fabaceae (Bean Family)
Habitat:		Woods and trail edges