Toxicodendron Hi KP it was an old ref one I added before wiki was asking for reference citation or I d have said where so may well be superseeded Unfortunately I ve mislaid where I got it from and couldn t find it again just now If it doesn t match modern research please do delete it An awful lot of books do still keep it merged in Rhus though particularly the Asian species like R T verniciflua so I think the Toxicodendron species should also be linked from the Rhus page as a lot of people might look for them there