Leptolobium is a small Neotropical genus of plants in the family Fabaceae, with 12 species currently recognized. With the exception of Leptolobium panamense, which occurs in tropical forests from northwestern South America to Mexico, all species of Leptolobium are restricted to South America and most diverse in Brazil. Most Leptolobium species have been traditionally included in Acosmium Schott (Fabaceae), but both genera have been recently distinguished based on several vegetative and reproductive traits.
Species Leptolobium comprises the following species: Section Leptolobium (Vogel) Yakovlev Leptolobium araguaiense Sch.Rodr. & A.M.G. Azevedo Leptolobium dasycarpum Vogel Leptolobium elegans Vogel Leptolobium glaziovianum (Harms) Sch.Rodr. & A.M.G.Azevedo Leptolobium multijugum Sch.Rodr. & A.M.G. Azevedo Leptolobium nitens Vogel Leptolobium panamense (Benth.) Sch.Rodr. & A.M.G. Azevedo Leptolobium parvifolium (Harms) Sch.Rodr. & A.M.G. Azevedo Leptolobium stirtonii (G.A. Aymard & V. González) Sch. Rodr. & A.M.G Leptolobium tenuifolium Vogel Section Mesitis (Vogel) Yakovlev Leptolobium bijugum Vogel Leptolobium brachystachyum(Benth.) Sch.Rodr. & A.M.G. Azevedo
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