Chloroleucon is a small genus of flowering trees and shrubs in the legume family Fabaceae (order Fabales), comprising around 11 species native to the tropical Americas. Its range extends from Mexico and Central America through the Caribbean islands and across South America to northern Argentina, with individual species occurring in countries including Brazil, Venezuela, Bolivia, Paraguay, and Argentina.
The genus belongs to the subfamily Mimosoideae, the mimosoid legumes, and its members typically bear the finely divided, pinnate foliage and small, clustered flowers characteristic of that group. One well-known member, Chloroleucon tortum, is cultivated as an ornamental and bonsai subject under the common name Brazilian rain tree, prized for its graceful form and the way its leaflets fold at night or in response to touch.
Some botanical authorities treat Chloroleucon as part of the broader genus Albizia, and the circumscription of the group has shifted over time with advances in legume phylogenetics. The name Chloroleucon is formed from the Greek χλωρóς (chloros, "green") and λευκός (leukos, "white"), likely referencing coloration in the flowers or foliage of the type species.
Etymology
The name Chloroleucon is derived from the Greek words χλωρóς (chloros), meaning "green," and λευκός (leukos), meaning "white," referring to coloration associated with the genus.
Distribution
Chloroleucon is native to the tropical Americas, with species distributed from Mexico and Central America through the Caribbean and across South America as far south as northern Argentina. Individual species occur in Brazil, Venezuela, Bolivia, Paraguay, and Argentina, among other countries.
Taxonomy Notes
Some botanical authorities subsume Chloroleucon into the genus Albizia, and the placement of its species has been revised with advances in legume systematics. GBIF currently treats it as an accepted genus in Fabaceae (order Fabales).
