... ) Formula and MW:C33H40O15;676.65 Common names: Horny goat weed, barrenwort, yin yang huo Botanical names: Epimedium brevicornum ... extracts; Epimedium segittatum (Sitb.et Zucc.) Maxim extracts;Horny Goat Weed,Lusty goat herb,etc. Plant Part Used: Branches and Leaves. ... women with low libido, and for women undergoing menopause. Horny Goat Weed (epimedium) is comprised of several species of epimedium, ...