Achatocarpus nigricans Triana Achatocarpus nigricans Triana in Ann. Sci. Nat., Bot., sér. 4, 9: 46. 1858 sec. Saynes-Vásquez 2011=Achatocarpus mexicanus H. Walter, Pflanzenr. IV 83(Heft 39): 139. 1909 syn. sec. The Plant List 2013