White-thorn acacia, Mescat acacia

Acacia constricta Gray

Fabaceae (Legume family)


A member of the Legume family, white-thorn acacia has typical legume-type leaves made up of three to nine pairs of leaflets. The leaflets may be located alternately along the stem or situated in pairs across from each other on the stem.

The stems are generally dark brown or black with characteristic paired, straight, white spines up to 1½inches long.

Its showy yellow flowers are spherical and very aromatic. The flowering date varies considerably with moisture conditions. The fruit of white-thorn acacia is a long, slender, linear legume or bean pod, usually maturing from July to September.

This plant has no forage value for livestock or wildlife.


White-thorn acacia grows in dry sandy, caliche or rocky soils in the western and mountain regions of Texas.