The "Kibana-ikari-so" (Epimedium koreanum) belongs to Berberidaceae (the Berberry family). It is a perennial herb that is native northward from Kinki district to the Japan Sea Side of Honshu and Hokkaido. This herb grows in montane woodlands and can reach 20-40 cm in height. The leaves are 3-lobed compound with acute tipped leaflets. They have stinging hairs at the edges. The pale yellow flowers come in April and May. The spurs elongate sprawling.