Clematis (n.)youdaoicibaDictYouDict[Clematis 词源字典]
plant genus, 1550s, "periwinkle," from Latin Clematis, from Greek klematis, in Dioscorides as the name of a climbing or trailing plant (OED says probably the periwinkle) with long and lithe branches, diminutive of klema "vine-branch, shoot or twig broken off" (for grafting), from klan "to break" (see clastic).[Clematis etymology, Clematis origin, 英语词源]