Height to 4 ft. Small, 4-petaled, clustered, white flowers; April to June. Arrowhead shaped leaves with irregularly toothed margins, leaves and stems smell like garlic when crushed. Fruit is long pod, tan outside, black seeds inside.

Identified in several counties in Nebraska.

Competes with native vegetation by early growth, inhibits the growth of mycorrhizal fungi, and can be lethal to butterfly larvae.