Epimedium, also known as barrenwort, bishop's hat, fairy wings, horny goat weed, or Yin Yang Huo (Chinese: Epimedium; Pinyin: Yínyánghùo; Wade–Giles: Yin²-yang²-huo⁴), is a flowering plant Berberidaceae. Most species are endemic to China, with smaller numbers elsewhere in Asia and some in the Medite