Manuel Incra Mamani

Manuel Incra Mamani (? – 1871) was a Bolivian ''cascarillero'' (bark and seed hunter) from Coroico. He may have been of either Quechua and/or Aymara descent. Mamani found a cinchona tree species (''Cinchona ledgeriana'' syn. ''C. calisaya'') that had a higher proportion of quinine than most others. This species went into Dutch commercial cultivation, providing most of the world's quinine well into the 20th century. Provided by Wikipedia