A NEW LOOK AT THE XANTHINE ALKALOIDS

Table 1.

Botanical Sources of Caffeine

Common Name	Plant Part	Genus and Species	Family
^aCaffeine is a minor constituent; the major xanthine is theobromine.
Coffee	Beans	Coffea arabica	Rubiaceae
Tea	Leaves	Camellia sinensis	Theaceae
Kola	Nuts	Cola acuminata	Sterculiaceae
Guarana	Paste made from seeds	Paullinia cupana	Sapindaceae
Maté (Paraguay Tea)	Leaves	Ilex paraguensis	Aquifoliaceae
Cocoa	Seeds^a	Theobroma cacao	Sterculiaceae