Erigeron canadensis var. glabratus A.Gray accepted as Erigeron canadensis L. (original description)
Franseria tenuifolia var. tripinnatifida A.Gray accepted as Ambrosia confertiflora DC. (original description)
Gaillardia odorata Lindh. ex A.Gray accepted as Gaillardia suavis (A.Gray & Engelm.) Britton & Rusby (original description)
Keerlia effusa A.Gray accepted as Chaetopappa effusa (A.Gray) Shinners (original description)
Kuhnia eupatorioides var. gracillima A.Gray accepted as Brickellia eupatorioides var. gracillima (A.Gray) B.L.Turner (original description)
Simsia calva A.Gray (original description)
Solidago decemflora A.Gray accepted as Solidago radula Nutt. (original description)