Heliocarpus mexicanus (Turcz.) Sprague Heliocarpus mexicanus (Turcz.) Sprague in Bull. Misc. Inform. Kew 1921 (7): 272. 1921 sec. Standl. & Steyerm. 1949=Heliocarpus glanduliferus B.L. Rob. ex Rose in Contr. U.S. Natl. Herb. 5: 127. 1897 syn. sec. Standl. & Steyerm. 1949