Damiana Mexican Liqueur

Packaged in a bottle shaped like a traditonal Incan goddess, Damiana is a liqueur made with the eponymous herb from Baha California in Mexico, and is (possibly spuriously) claimed by its makers to have been an ingredient in the first ever Margarita, before being usurped by triple sec. If anyone can cast any light on these claims, answers in the comments section below, please. [+]