Theobroma cacao coming from Chuao were awarded an appellation of origin under the title "Cacao de Chuao" (from Spanish-"cacao of Chuao"). The cacao bean in 80% of chocolate is made using beans of the Forastero group, the main and most ubiquitous variety being the Amenolado variety, while the arriba variety (such as the Nacional variety) are less commonly found in Forastero produce. Forastero trees are significantly hardier and more disease-resistant than Criollo trees, resulting in cheaper cacao beans. Major cocoa bean processors include Hershey's, Nestlé and Mars, all of which purchase cocoa beans via various sources. Chocolate can be made from "T.
North-West University Botanical Garden rockery. Some more common plant genera represented in the garden include Acacia, Aloe, Bonatea, Crinum, Dierama, Encephalartos, Eucomis, Eulophia, Euphorbia, Gasteria, Gladiolus, Haworthia, Hypoxis, Indigofera, Kniphofia, Plectranthus, Podocarpus, Polygala, Scadoxus, Searsia, Stapelia and Zantedeschia. In the tropical greenhouse a variety of tropical and subtropical plants from all over the world can be found. Some of the plants include a variety of food and medicinal plants including "Coffea arabica" (coffee), "Camellia sinensis" (tea), "Vanilla planifolia" (vanilla), "Saccharum officinarum" (sugarcane), "Cinnamomum zeylanicum" (cinnamon), "Oryza sativa" (rice), "Theobroma cacao" (cacao), "Siphonochilus aethiopicus" (wild ginger), "Warburghia salutaris" (pepper bark tree) and "Piper nigrum" (pepper).