Eupatorium trifoliatum var. amoenum (Pursh) Farw. accepted as Eutrochium purpureum var. purpureum (original description)
Eupatorium trifoliatum var. bruneri (A.Gray) Farw. accepted as Eutrochium maculatum var. bruneri (A.Gray) E.E.Lamont (original description)
Hieracium subnudum var. foliosum Farw. (original description)
Hieracium subnudum var. hirsutissimum Farw. (original description)
Hieracium venosum var. nudicaule (Michx.) Farw. accepted as Hieracium venosum L. (original description)
Prenanthes alba var. ovata Farw. (original description)
Prenanthes alba var. pinnatifida Farw. (original description)
Prenanthes altissima var. deltoidea (Elliott) Farw. (original description)
Prenanthes altissima var. ovata (Torr. & A.Gray) Farw. (original description)
Sonchus arvensis var. eglandulosus Farw. (original description)