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Genus Kirkia
- small genus of tropical South African trees and shrubs
Genus Picrasma
- small genus of deciduous trees of tropical America and Asia
Genus Quassia
- tropical trees and shrubs with pinnate leaves and large scarlet flowers; bark is medicinal
Genus Tropaeolum
- a tropical American genus of dicotyledonous climbing or diffuse pungent herbs constituting the family Tropaeolaceae
Genus Zygophyllum
- usually tropical herbs or shrubs having ill-smelling foliage and flower buds that are used as capers: bean capers
Genus Guaiacum
- small genus of evergreen resinous trees or shrubs of warm and tropical America
Genus Larrea
- xerophytic evergreen shrubs; South America to southwestern United States
Genus Tribulus
- annual or perennial herbs or subshrubs of warm regions
Genus Salix
- a large and widespread genus varying in size from small shrubs to large trees: willows