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Genus Ricinus
- a genus of herb having only one known species: castor-oil plant
Genus Cnidoscolus
- a genus of perennial plant with bristles; belonging to the family Euphorbiaceae
Genus Jatropha
- a mainly tropical genus of American plant belonging to the family Euphorbiaceae
Genus Hevea
- small genus of South American trees yielding latex; "rubber trees are usually cultivated in plantations"
Genus Manihot
- genus of economically important tropical plants: cassava
Genus Pedilanthus
- tropical American succulent shrubs
Genus Camellia
- tropical Asiatic evergreen shrubs or small trees