Achaetogeron linearifolius S.Watson accepted as Erigeron janivultus G.L.Nesom (original description)
Aster carnerosanus S.Watson accepted as Symphyotrichum carnerosanum (S.Watson) G.L.Nesom (original description)
Aster engelmannii var. paucicapitatus B.L.Rob. accepted as Eucephalus paucicapitatus (B.L.Rob.) Greene (original description)
Bahia schaffneri S.Watson accepted as Picradeniopsis schaffneri (S.Watson) B.G.Baldwin (original description)
Bidens dahlioides S.Watson accepted as Cosmos diversifolius var. dahlioides (S.Watson) Melchert (original description)
Cacalia poculifera S.Watson accepted as Psacalium poculiferum (S.Watson) Rydb. (original description)
Cnicus linearifolius S.Watson (original description)
Cnicus velatus S.Watson accepted as Cirsium velatum (S.Watson) Petr. (original description)
Dahlia dissecta S.Watson (original description)
Dahlia pubescens S.Watson accepted as Dahlia brevis P.D.Sørensen (original description)
Eupatorium chapalense S.Watson accepted as Ageratina lasioneura (Hook. & Arn.) R.M.King & H.Rob. (original description)
Eupatorium espinosarum var. subintegrifolium B.L.Rob. accepted as Ageratina espinosarum var. subintegrifolia (B.L.Rob.) B.L.Turner (original description)
Eupatorium madrense S.Watson accepted as Chromolaena bigelovii (A.Gray) R.M.King & H.Rob. (original description)
Gymnolomia decumbens B.L.Rob. (original description)
Gymnolomia decumbens S.Watson (original description)
Melampodium bibracteatum S.Watson (original description)
Melampodium glabrum S.Watson (original description)
Oligonema S.Watson accepted as Grindelia Willd. (original description)
Oligonema heterophyllum S.Watson (original description)
Otopappus acuminatus S.Watson (original description)
Otopappus alternifolius B.L.Rob. accepted as Verbesina robinsonii (Klatt) Fernald ex B.L.Rob. & Greenm. (original description)
Perezia collina S.Watson accepted as Acourtia glomeriflora (A.Gray) Reveal & R.M.King (original description)
Psilactis tenuis S.Watson accepted as Machaeranthera tenuis (S.Watson) B.L.Turner & D.B.Horne (original description)
Salmea palmeri S.Watson (original description)
Senecio guadalajarensis B.L.Rob. (original description)
Senecio jaliscanus S.Watson (original description)
Spilanthes botterii S.Watson accepted as Acmella radicans (Jacq.) R.K.Jansen (original description)
Tithonia macrophylla S.Watson accepted as Tithonia rotundifolia (Mill.) S.F.Blake (original description)
Viguiera leptocaulis S.Watson (original description)