Federal Noxious Weed. Height to 6 ft., purple to white terminal raceme flowers; June to July. Leaves are pinnately compound, with 6-10 small leaflets with a spine at the tip. Stems are hollow and round. Fruit is in a pod that contains 9 seeds.
Shore lines of streams, low pastures and ditches.
Location in Nebraska
Found in only a couple counties in Nebraska (in the East and West).
Pathway of Introduction and Spread
Originally from the Middle East, introduced for livestock grazing. Seed distributed by wildlife, wind, and equipment (seeds viable for up to 10 years).
Forms dense colonies that deter livestock movement. Is toxic to sheep. Competes with native vegetation.