Acaciella angustissima (Mill.) Britton & Rose

Acaciella angustissima (Mill.) Britton & Rose. Acaciella angustissima, commonly known as the prairie acacia, white-ball acacia, ocpatl, or palo de pulque, is a species of legume most recognized for its drought tolerance and its ability to be used as a green manure and ground covering. It is a perennial, deciduous, and belongs to the family Fabaceae (beans/legumes) and as it grows it starts as a shrub but eventually matures to a small tree. The tree has a high density of leaves along with small clumps of white flowers and creates 4–7 cm (1.6–2.8 in) long seed pods.