Callaeum

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.