Desmanthus, a genus of the subfamily Mimosoideae of the Leguminosae, is represented in the United States by ten species, one of which has two varieties. Nine species are found in Texas (Turner, 1950b). The genus has its greatest concentration in Mexico where sixteen species occur (Turner, 1950a). In the present paper chromosome studies on Desmanthus acuminatus, D. brevipes, D. leptolobus, D. velutinus and D. virgatus var. depressus are reported. These five species occur in Texas
