Turnera Diffusa aka Damianahttps://en.wikipedia.org/wiki/Turnera_diffusa
Has been traditionally used as a calming anti-anxiety aid for centuries in many cultures. More recently western medical science has been looking to the plant and it's close relatives for a benzodiazepine substitute. Here is one studyhttps://www.sciencedirect.com/science/article/pii/S037887411... I read a similar study conducted by German health institution, but can't seem to !g the link right now.
I've used Damiana for many years. I smoke it like pot, make tea out of the leaves, make ethanol extracts (tincture in gin or vodka) and have even vaporized the herb. It is a very very effective anti-anxiety aid. And it is equally effective at arousal of sexual desires, and increase in sexual pleasure. Damiana is very safe too. I think it impossible to overdose on the herb.