Coffee - Information from Wikipedia on the plant producing this beverage, its history, biology, cultivation, processing, social aspects, health aspects and economics. The Coffee Tree - Information on this tropical shrub, its varieties, flowers, leaves and fruit. Coffea arabica - Characteristics of the coffee plant as an invasive species in Pacific island ecosystems. Coffee Plant: Arabica and Robusta - Outlines the difference between these two species of coffee and describes the growth and development of the tree, the root system and the leaves. Coffea arabica - Brief description and taxonomy of the coffee plant. Coffee: Coffea arabica - Research project by Madeline Fitch-Braun at the University of Wisconsin-LaCrosse. Coffea arabica - A gallery of images of coffee plants, photographed in Hawaii. Coffee - Information on the ecosystems suiting this crop, its botany and cultivation, provided by Rambouts.