Epimedium L. (Berberidaceae) is an important genus, for 1) no good taxonomic system of the genus has been proposed till now, and the relationships among the species of the genus are not very clear. It is considered that this genus is difficult taxonomically like other genera in Berberidaceae ; 2) herb epimedii, as a traditional Chinese medicine, has been used for very long time, and is the hotpot of modern pharmaceutical studies for its wide and good curative effects. In the present study, the ITS sequences...