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Genus Amsonia
- genus of herbs and subshrubs with milky juice and showy bluish flowers; Europe to Asia Minor to Japan and North America
Genus Beaumontia
- small genus of evergreen woody vines in the East Indies and Asia
Genus Carissa
- Old World genus of tropical evergreen usually spiny shrubs
Genus Catharanthus
- small genus of erect annual or perennial herbs native to Madagascar; widely naturalized in the tropics; formerly included in genus Vinca
Genus Holarrhena
- genus of deciduous trees and shrubs of tropical Africa and Asia
Genus Mandevilla
- genus of tropical South American tuberous perennial woody vines with large racemose flowers and milky sap
Genus Dipladenia
- genus of tropical South American tuberous perennial woody vines with large racemose flowers and milky sap
Genus Plumeria
- deciduous shrubs and trees of tropical America having branches like candelabra and fragrant white or pink flowers
Genus Rauwolfia
- pantropical genus of somewhat poisonous shrubs and small trees