- small shrub usually 2 feet tall or shorter
- leaves bipinnately compound, with 5-9 pinnae
- pinnae with 2-3 pairs of leaflets, with no terminal leaflet
- ultimate leaf segments <1/4 inch long, almost round, with strong veins on lower surface
- flowers in short racemes, with 5 yellow petals
- pod 1 -11/4 inches long, 1/2 inch wide, with 2 seeds
- grows in brush on caliche or calcareous sandstone west of Lake Corpus Christi in Jim Wells and Live Oak counties
- also known from Tamaulipas