Jatropha macrantha, also called the Huanarpo Macho or more recently Peruvian Viagra, is a medium size shrubby tree species in the genus Jatropha with orange red flowers. It is indigenous to Peru. It is as popular in Peru as Muira Puama is in Brazil. Catechin, catechin-7-O-β-glucopyranoside and procyanidin B3 can be found in Huanarpo Macho.