Ambrosia longifolia Sessé & Moc. accepted as Ambrosia ambrosioides W.W.Payne (original description)
Ambrosia palustris Sessé & Moc. accepted as Euphrosyne partheniifolia DC. (original description)
Anthemis chrysantha Sessé & Moc. accepted as Verbesina seatonii S.F.Blake (original description)
Anthemis crassifolia Sessé & Moc. accepted as Borrichia arborescens (L.) DC. (original description)
Anthemis multiflora Sessé & Moc. accepted as Jaegeria macrocephala Less. (original description)
Anthemis trinervia Sessé & Moc. accepted as Heliopsis buphthalmoides (Jacq.) Dunal (original description)
Anthemis variabilis Sessé & Moc. accepted as Sabazia humilis (Kunth) Cass. (original description)
Aster pinnatifidus Sessé & Moc. accepted as Machaeranthera tanacetifolia (Kunth) Nees (original description)
Aster reptans Sessé & Moc. accepted as Osbertia stolonifera (DC.) Greene (original description)
Aster setiger Sessé & Moc. (original description)
Aster variabilis Sessé & Moc. accepted as Erigeron longipes DC. (original description)
Athanasia nudisperma Sessé & Moc. accepted as Alloispermum scabrum (Lag.) H.Rob. (original description)
Cacalia albicans Sessé & Moc. accepted as Cacalia incana L. accepted as Gynura divaricata (L.) DC. (original description)
Chrysanthemum longifolium Sessé & Moc. (original description)
Chrysanthemum procumbens (L.) Sessé & Moc. accepted as Tridax procumbens L. (original description)
Chrysocoma trinervata Sessé & Moc. (original description)
Cineraria punctata Sessé & Moc. (original description)
Conyza herbacea Sessé & Moc. (original description)
Conyza mexicana Sessé & Moc. (original description)
Coreopsis crassifolia Sessé & Moc. accepted as Dahlia pinnata Cav. (original description)
Coreopsis repens Sessé & Moc. (original description)
Elephantopus glaber Sessé & Moc. accepted as Elephantopus carolinianus Raeusch. (original description)
Erigeron amplexicaulis Sessé & Moc. (original description)
Erigeron annuus Sessé & Moc. accepted as Bellis annua L. (original description)
Erigeron grandiflorus Sessé & Moc. (original description)
Erigeron lineatus Sessé & Moc. (original description)
Erigeron perennis (L.) Sessé & Moc. accepted as Bellis perennis L. (original description)
Erigeron rivalis Sessé & Moc. (original description)
Erigeron tuxtlensis Sessé & Moc. (original description)
Eupatorium dubium Sessé & Moc. (original description)
Eupatorium nudispermum Sessé & Moc. accepted as Ageratum maritimum Kunth (original description)
Eupatorium paleaceum Sessé & Moc. accepted as Ageratum conyzoides L. (original description)
Eupatorium piperitum Sessé & Moc. accepted as Ageratina glabrata (Kunth) R.M.King & H.Rob. (original description)
Eupatorium sessile Sessé & Moc. accepted as Vernonia sericea Rich. (original description)
Gnaphalium lineare Sessé & Moc. (original description)
Helenium integrifolium Sessé & Moc. (original description)
Helianthus buccinatus Sessé & Moc. (original description)
Helianthus procumbens Sessé & Moc. (original description)
Helianthus quinquelobus Sessé & Moc. accepted as Tithonia diversifolia (Hemsl.) A.Gray (original description)
Hieracium hirsutum Sessé, Moc., Sessé & Moc. (original description)
Melampodium diversifolium Sessé & Moc. (original description)
Melampodium lanceolatum Sessé & Moc. accepted as Melampodium microcephalum Less. (original description)
Melampodium repens Sessé & Moc. (original description)
Melampodium rhombifolium Sessé & Moc. accepted as Melampodium divaricatum (Rich.) DC. (original description)
Pectis multiradiata Sessé & Moc. (original description)
Polymnia depressa Sessé & Moc. (original description)
Santolina scabra Sessé & Moc. (original description)
Senecio canicida Sessé & Moc. (original description)
Senecio canicidus Sessé & Moc. accepted as Roldana ehrenbergiana (Klatt) H.Rob. & Brettell (original description)
Senecio lactucella Sessé & Moc. accepted as Packera bellidifolia (Kunth) W.A.Weber & Á.Löve (original description)
Senecio lobatus Sessé & Moc. (original description)
Senecio pinnatus Sessé & Moc. (original description)
Senecio vulcanicus Sessé & Moc. (original description)
Senecio vulnerarius Sessé & Moc. accepted as Packera bellidifolia (Kunth) W.A.Weber & Á.Löve (original description)
Senecio xarilla Sessé & Moc. (original description)
Serratula scabra Sessé & Moc. (original description)
Silphium ternatum Sessé & Moc. (original description)
Solidago secunda Sessé & Moc. (original description)
Sonchus angulatus Sessé & Moc. (original description)
Spilanthes litoralis Sessé & Moc. accepted as Melanthera nivea (L.) Small (original description)
Spilanthes muticus Sessé & Moc. (original description)
Spilanthes volubilis Sessé & Moc. (original description)
Verbesina perfoliata Sessé & Moc. (original description)