... :C33H40O15;676.65 Common names: Horny goat weed, barrenwort, yin yang huo Botanical names: Epimedium brevicornum Maxim.;Epimedium sagittatum (Siebold. et ... blood flow to the genital area. Referred to as Yin-Yang Huo in China, where it originates, Horny Goat Weed also ...