in J. J. Roemer et al., Syst. Veg. 6: 679. 1820.
Tex., Mexico, West Indies, Central America, South America (ne Brazil).
Varieties 2 (1 in the flora).
Turnera diffusa is used extensively as an anticough, diuretic, and aphrodisiac agent. It has antibacterial activity against the most common gastrointestinal diseases of Mexico (T. Hernández et al. 2003). Variety aphrodisiaca (Ward) Urban, with glabrous leaves, grows only in Mexico and West Indies.