Guarana (Paullinia Cupana) is common in the Amazon basin in Brazil and Paraguay, as well as Venezuela, Colombia and Peru. Guarana is an evergreen climbing vine of the Sapindaceae family, which often reaches 10 meters in height. The leaves are large, pinnate, regular oval, on long petioles, serrated along the edge. The flowers are small, white, fragrant, collected in panicle inflorescences. Guarana fruit is a box of red, up to 8 cm long. When ripe (January-February), the skin of the fruit cracks and opens one black or lilac-brown seed, resembling a grain of coffee.