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   » » Wiki: Turnera Diffusa
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Turnera diffusa, known as damiana, is a native to southern in the United States,

(2025). 9780896724730, Texas Tech University Press. .
Mexico, Central America, South America, and the Caribbean. It belongs to the family .

Damiana is a relatively small, woody shrub that produces small, aromatic flowers. It blossoms in early to late summer, followed by fruits that taste similar to figs. The shrub is said to have a strong spice-like odor somewhat like , due to the aromatic compounds present in the plant.

Damiana is traditionally used in and , historically featured in 19th-century as an alleged , and today is valued in and blends for its and mild psychoactive effects. It contains a complex mix of —including like and , , phenolics, cyanogenic , and others. It serves as a host plant for the Mexican fritillary ( Euptoieta hegesia), a .

Many and sold as T. diffusa are actually Turnera ulmifolia (“false damiana”), a different with different chemical properties and uses, and this misidentification mostly happens in sales, not in markets.


Uses
Damiana is an ingredient in a traditional , which is sometimes used in lieu of in . Mexican folklore claims that it was used in the "original" margarita. The damiana margarita is popular in the region of Mexico.

Damiana was included in several 19th-century , such as Pemberton's French Wine Coca. The leaves were omitted from that product's non-alcoholic counterpart, .

(2025). 9780465054688, Basic Books. .
In folklore, the plant was believed to be an aphrodisiac, hence its sometimes used binomial synonym, Turnera aphrodisiaca.

Beyond its historical use in drinks, Damiana continues to be a valued herb for its ability to induce relaxation and improve emotional well-being. It is commonly found in modern herbal teas and smoking blends, where it is used for its calming, mild psychoactive effects.


Phytochemistry
Damiana contains damianin; tetraphyllin B; gonzalitosin I; ; tricosan-2-one; ; ; β-sitosterol; 1,8-cineole; ; ; ; ; ; ;
(2025). 9781583331439, Penguin. .
and . In total, 22 , , , seven cyanogenic glycosides, , , , the polyterpene ficaprenol-11, , and have been found in the genus Turnera. As of 2006, damiana's constituents have not been identified for their effects attributed to the whole herb.


Ecology
T. diffusa is a host plant for the Mexican fritillary ( Euptoieta hegesia), a butterfly.
(2025). 9781555663476, Johnson Books.


Misidentification in commerce
Viable plant and seed material sold as T. diffusa from both private and commercial sources largely turns out to be misidentified Turnera ulmifolia (a.k.a. "False Damiana"), a closely related species. This widespread issue has been noted by the scientific community, and has created much confusion among both amateur and professional horticulturists alike. Mature stems of T. diffusa are woody, with small, grayed green leaves 13 to 16 mm long, 4.5 to 5.5 mm wide, obtuse at the apex, and strongly aromatic when crushed. T. ulmifolia is differentiated by herbaceous stems, larger blue-green leaves that are strongly dentate with a pointed apex, and only weakly aromatic. One scientific study however, demonstrated this confusion being mostly associated with horticultural commerce, and does not extend appreciably to commercial herbal products, most of which exhibit constituents that can be definitively traced to T. diffusa.


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