Pausinystalia yohimba

Pausinystalia yohimba Corynanthe johimbe) (Rubiaceae) is an evergreen tree that grows wild in the southern areas of Africa, and is known locally as yohimbe. The bark of P. yohimba has been used as an aphrodisiac drug for centuries. 

Yohimbine is derived from the bark of Aspidosperma quebracho (Apocynaceae) and Pausinystalia yohimba (Rubiaceae). These plants are reputedly aphrodisiacs. Yohimbine blocks a-adrenergic transmissions but stimulates p-adrenergic sites (Robinson 1981). Yohimbine and strychnine are sometimes combined in pharmaceutical preparations for use as aphrodisiacs and nerve tonics. 

Source Pausinystalia yohimba Pierre ex Beille. P. johimbe (Schumann) Beille, Corynanthe johimbi Schumann) (Family Rubiaceae). 

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