Family: Cactaceae (Cactus Family) Scientific name: Lophophora williamsii (Lem. ex ex Salm-Dyck.) Coulter in Contrib. U.S. Nat. Herb. 3 (1894) 131. Origin: Grows in an area that stretches from from the Chihuahuan Desert to the South Texas Plains, on either side of the middle and lower Rio Grande River, southward to the Mexican state of San Luís Potosí. Extensive stands of peyote occur on the low, rocky hills in Starr, Zapata, Webb, and Jim Hogg counties of southern Texas. Habitat: Grows isolated or in groups usually in calcareous deserts, on rocky slopes, or in dried river beds.