[2][3] Amorpha ouachitensis is a shrub growing up to about 2 meters (80 inches) tall.

The inflorescence is made up of many flowers with purple petals and yellow anthers.

In Arkansas the plant occurs in Conway, Garland, Logan, Montgomery, and Polk Counties.

Amorpha ouachitensis grows in clearings and on rocky slopes, often next to streams or on floodplains.

It is associated with other plants that include Calamovilfa arcuata, Streptanthus squamiformis, and Gaura demareei.