Strombocarpa cinerascens A. Gray, Smithsonian Contr. Knowl. 3(5): 61. 1852.

Prosopis cinerascens (A. Gray) Benth., Trans. Linn. Soc. London 30: 381. 1875.

Prosopis reptans var. cinerascens (A. Gray) Burkart, Darwiniana 4: 75. 1940.

Prosopis reptans subsp. cinerascens (A. Gray) A.E. Murray, Kalmia 13: 24. 1983.

Mimosa calcarea Buckley, Proc. Acad. Nat. Sci. Philadelphia 1861: 453. 1862.

Type material.

Mexico. Nuevo León ("New Leon"), valley near Azufrosa, Gregg 492 (holotype: GH [GH00003469]; isotypes: K [K000791013], MO [MO356342]).