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The generic name Rhus derives from Ancient Greek ῥοῦς rhous referring to the type species R. coriaria,[1][2] of unknown etymology; the suggestion that it is connected with the verb ῥέω rheō "to flow"[3] is now rejected by scholars.[citation needed] The taxonomy of Rhus has a long history, with de Candolle proposing a subgeneric classification with 5 sections in 1825. At its largest circumscription, Rhus, with over 250 species, has been the largest genus in the family Anacardiaceae.