This section is from the book "Materia Medica Pharmacy, Pharmacology And Therapeutics", by W. Hale White. Also available from Amazon: Materia Medica Pharmacy, Pharmacology And Therapeutics..
Damiana. (Not official.) - The leaves of several plants, principally Bigelovia veneta Gray and Turnera microphylla De Candolle, var., aphro-disiaca (nat. ord. Turneraceae).
Western North America.
Dose, 1/2 to 1 oz.; 15. to 30. gm.
Damiana has enjoyed considerable reputation as a remedy for sexual atony. Some observers believe it to be only tonic. It is best administered as a fluid extract, in the dose of 1/2 fl. dr., 2. cc.