Author Archives: Brian M. Irish

About Brian M. Irish

Brian M. Irish is a horticulturist/geneticist for USDA’s Tropical Agriculture Research Station (USDA-ARS-TARS). You can eMail him at

‘Luisa’ Turnera Holds Great Potential

Turnera diffusa is a widespread and variable species found throughout the tropical Americas. Commonly known as “damiana,” Turnera diffusa has figured extensively in folk medicine and is particularly noted for its aphrodisiacal properties for which there is scientific support. In 2005, we conducted a plant exploration in Puerto Rico for species with ornamental potential. In