Muira puama

Genus: Ptychopetalum
english name: Muira puama, potency wood, marapuama, marapama, muiratã, muiratam, pau-homen, potenzholz
species: olacoides

Family: Olacaceae
Contenents: fatty acids and fatty acid esters, essential oils, plant sterols, triterpene, and a new alkaloid-which they named muirapuamine.
Parts used: Bark and root
Properties: aphrodisiac, tonic for the nervous system an antirheumatic
Uses
internal uses: treat impotence, infertility, nerve pain, menstrual disturbances, and dysentery
external uses:

The root and bark are used for a variety of ailments by indigenous peoples in the Rio Negro area of South America, and have become popular as herbal treatments for sexual dysfunction. It improves psychological and physical aspects of libido and sexual function, menstrual cramps and PMS, neurasthenia, to tonify the nervous system and for treating cases of mild exhaustion. The indigenous name for the genus is Muira Puama, "potency wood".