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