Prosopis pubescens, Benth. (Strombocarpa pubescens, Gray). Screw Bean. Tornillo. Shrub or small tree, merely spinescent on petioles: lfts. 5-8 pairs, oblong, 1/4-1/3in.long: spikes globose to cylindrical, 1 1/2-2 in. long: pod twisted, nearly sessile, 1-2 in. long. Texas, Calif., Mex. —The pods are used as food by Mexicans and Indians.