Callaeum is a genus in the Malpighiaceae, a family of about 75 genera of flowering plants in the order Malpighiales. Callaeum comprises 11 species of woody vines and shrubs occurring from western Texas to Mexico, Central America, and South America. Two species, C. macropterum and C. septentrionale are cultivated as ornamentals in Arizona and California.
Species Callaeum antifebrile (Griseb.) D.M.Johnson Callaeum chiapense (Lundell) D.M.Johnson Callaeum clavipetalum D.M.Johnson Callaeum coactum D.M.Johnson Callaeum johnsonii W.R.Anderson Callaeum macropterum (DC.) D.M.JohnsonCallaeum malpighioides (Turcz.) D.M.Johnson Callaeum nicaraguense (Griseb.) Small Callaeum psilophyllum (Adr.Juss.) D.M.Johnson Callaeum reticulatum D.M.Johnson Callaeum septentrionale (Adr.Juss.) D.M.Johnson
References
Malpighiaceae Malpighiaceae - description, taxonomy, phylogeny, and nomenclature Callaeum Anderson, W. R. 2006a. A new species of Callaeum (Malpighiacee) from Puebla, Mexico. Acta Botanica Mexicana 74: 179–183. Johnson, D. M. Revision of the Neotropical Genus Callaeum (Malpighiaceae). Systematic Botany 11: 335–353.