Cocao Flowers are produced in clusters directly on the trunk and older branches of the Cocoa Tree; they are small, 1–2 cm (1/2-1 in) diameter, with pink calyx. While many of the world's flowers are pollinated by bees (Hymenoptera) or butterflies/moths (Lepidoptera), cocao flowers are pollinated by tiny flies, midges in the order Diptera. The fruit, called a cacao pod, is ovoid, 15–30 cm (6-12 in) long and 8–10 cm (3-4 in) wide, ripening yellow to orange, and weighs about 500 g (1 lb) when ripe. The pod contains 20 to 60 cocoa seeds, usually called "beans", embedded in a white pulp.
Cocoa flower

Each seed contains a significant amount of fat (40–50% as cocoa butter). Their most noted active constituent is theobromine, a compound very similar to caffeine.