Acanthospermum humile (Sw.) DC. (original description)
Acanthospermum xanthioides var. acutifolium DC. accepted as Acanthospermum australe (Loefl.) Kuntze (original description)
Acanthospermum xanthioides var. glabratum DC. accepted as Acanthospermum glabratum (DC.) Wild (original description)
Acanthospermum xanthioides var. obtusifolium DC. accepted as Acanthospermum australe (Loefl.) Kuntze (original description)
Achillea bandana Buch.-Ham. ex DC. (original description)
Achyropappus maritimus Poepp. ex DC. accepted as Bahia ambrosioides Lag. (original description)
Acosta DC. accepted as Spiracantha Kunth (original description)
Acosta rolandrae DC. accepted as Spiracantha cornifolia Kunth (original description)
Actinolepis DC. accepted as Eriophyllum Lag. (original description)
Actinolepis multicaulis DC. accepted as Eriophyllum multicaule (DC.) A.Gray (original description)
Actinomeris alternifolia (L.) DC. accepted as Verbesina alternifolia (L.) Britton ex Kearney (original description)
Actinomeris alternifolia var. alba (Michx.) DC. (original description)
Actinomeris oppositifolia DC. (original description)
Actinomeris pedunculosa DC. accepted as Verbesina pedunculosa (DC.) B.L.Rob. (original description)
Actinomeris tetragona DC. accepted as Verbesina tetraptera (Ortega) A.Gray (original description)
Actinomeris tetraptera (Ortega) DC. accepted as Verbesina tetraptera (Ortega) A.Gray (original description)
Adenophyllum capillaceum DC. accepted as Adenophyllum glandulosum (Cav.) Strother (original description)
Adenostemma berteroi DC. (original description)
Adenostemma caffrum DC. (original description)
Adenostemma dregei DC. accepted as Adenostemma viscosum J.R.Forst. & G.Forst. (original description)
Adenostemma erectum (Sw.) DC. accepted as Adenostemma lavenia (L.) Kuntze (original description)
Adenostemma fastigiatum (Blume) DC. accepted as Adenostemma lavenia (L.) Kuntze (original description)
Adenostemma glutinosum DC. accepted as Adenostemma viscosum J.R.Forst. & G.Forst. (original description)
Adenostemma hirsutum (Blume) DC. (original description)
Adenostemma macrophyllum (Blume) DC. accepted as Adenostemma viscosum J.R.Forst. & G.Forst. (original description)
Adenostemma mauritianum DC. (original description)
Adenostemma microcephalum DC. accepted as Adenostemma viscosum J.R.Forst. & G.Forst. (original description)
Adenostemma natalense DC. accepted as Adenostemma viscosum J.R.Forst. & G.Forst. (original description)
Adenostemma parviflorum (Blume) DC. accepted as Adenostemma viscosum J.R.Forst. & G.Forst. (original description)
Adenostemma perrottetii DC. accepted as Adenostemma viscosum J.R.Forst. & G.Forst. (original description)
Adenostemma roylei DC. accepted as Adenostemma madurense DC. (original description)
Adenostemma triangulare DC. accepted as Adenostemma brasilianum (Pers.) Cass. (original description)
Adenostyles glabra (Mill.) DC. accepted as Adenostyles alpina (L.) Bluff & Fingerh. (original description)
Adenostyles hybrida (Vill.) DC. accepted as Adenostyles leucophylla (Willd.) Rchb. (original description)
Agarista DC. accepted as Coreopsis L. (original description)
Agarista calliopsidea DC. accepted as Coreopsis calliopsidea (DC.) A.Gray (original description)
Agathaea amelloides (L.) DC. accepted as Felicia amelloides (L.) Voss (original description)
Agathaea barbata DC. accepted as Felicia ovata (Thunb.) Compton (original description)
Agathaea bergeriana (Spreng.) DC. accepted as Felicia bergeriana (Spreng.) O.Hoffm. (original description)
Agathaea brevifolia DC. accepted as Felicia brevifolia (DC.) Grau (original description)
Agathaea diffusa DC. accepted as Felicia diffusa subsp. diffusa (DC.) Grau (original description)
Agathaea hirta DC. accepted as Felicia aculeata Grau (original description)
Agathaea hispida DC. accepted as Felicia hispida (DC.) Grau (original description)
Agathaea leiocarpa DC. accepted as Zyrphelis montana (Schltr.) G.L.Nesom (original description)
Agathaea scabrida DC. accepted as Felicia scabrida (DC.) Range (original description)
Agathaea stricta DC. accepted as Felicia amoena subsp. stricta (DC.) Grau (original description)
Agathaea tenera DC. accepted as Felicia tenera (DC.) Grau (original description)
Ageratum conyzoides subsp. conyzoides var. mexicanum (Sims) DC. (original description)
Ageratum conyzoides subsp. conyzoides var. obtusifolium (Lam.) DC. (original description)
Ageratum febrifugum Sessé ex Sessé ex DC. accepted as Piqueria trinervia Cav. (original description)
Ageratum melissifolium DC. (original description)
Ageratum purpureum Moc. & Sessé ex DC. accepted as Stevia viscida Kunth (original description)
Agrianthus Mart. ex DC. (original description)
Agrianthus campestris Mart. (original description)
Agrianthus empetrifolius Mart. ex DC. (original description)
Aiolotheca DC. accepted as Zaluzania Pers. (original description)
Aiolotheca parthenioides DC. accepted as Zaluzania parthenioides (DC.) Rzed. (original description)
Alarconia DC. accepted as Wyethia Nutt. (original description)
Alarconia angustifolia DC. accepted as Wyethia angustifolia (DC.) Nutt. (original description)
Alarconia helenioides DC. accepted as Wyethia helenioides (DC.) Nutt. (original description)
Albertinia DC. (original description)
Albertinia bardanoides Mart. (original description)
Albertinia bicolor DC. accepted as Paralychnophora bicolor (DC.) MacLeish (original description)
Albertinia capitata (Spreng.) DC. accepted as Eremanthus capitatus (Spreng.) MacLeish (original description)
Albertinia crotonoides DC. accepted as Eremanthus crotonoides (DC.) Sch.Bip. (original description)
Albertinia elaeagnus Mart. ex DC. accepted as Eremanthus elaeagnus (Mart. ex DC.) Sch.Bip. (original description)
Albertinia glomerulata (Less.) DC. accepted as Eremanthus glomerulatus Less. (original description)
Albertinia multiflora Mart. (original description)
Albertinia obtusata Mart. (original description)
Albertinia pallidiseta DC. accepted as Eremanthus glomerulatus Less. (original description)
Albertinia polycephala DC. accepted as Eremanthus polycephalus (DC.) MacLeish (original description)
Albertinia rufiseta DC. accepted as Eremanthus glomerulatus Less. (original description)
Albertinia saligna Mart. (original description)
Albertinia verbascifolia Mart. (original description)
Alciope lanata (Thunb.) DC. accepted as Capelio tomentosa (Burm.f.) B.Nord. (original description)
Alciope tabularis (Thunb.) DC. accepted as Capelio tabularis (Thunb.) B.Nord. (original description)
Alix Comm. ex DC. accepted as Psiadia Jacq. ex Willd. (original description)
Alix salsifolia Comm. ex DC. accepted as Psiadia retusa DC. (original description)
Allocarpus integrifolius DC. accepted as Alloispermum integrifolium (DC.) H.Rob. (original description)
Amblyolepis DC. (original description)
Amblyolepis setigera DC. (original description)
Ambrosia aptera DC. (original description)
Ambrosia crithmifolia DC. (original description)
Ambrosia fruticosa DC. accepted as Ambrosia confertiflora DC. (original description)
Ambrosia fruticosa var. intermedia DC. accepted as Ambrosia artemisioides Meyen & Walp. ex Meyen & Walp. (original description)
Ambrosia maritima Ferrero ex DC. accepted as Ambrosia crithmifolia DC. (original description)
Ambrosia microcephala DC. (original description)
Ambrosia peruviana DC. accepted as Ambrosia psilostachya DC. (original description)
Ambrosia polystachya DC. (original description)
Ambrosia psilostachya DC. (original description)
Ambrosia pusilla Raf. ex DC. accepted as Ambrosia polystachya DC. (original description)
Ambrosia senegalensis DC. accepted as Ambrosia maritima L. accepted as Ambrosia polystachya DC. (original description)
Amellus coilopodius DC. (original description)
Amellus floribundus Willd. ex DC. accepted as Liabum igniarium Less. (original description)
Amellus flosculosus DC. (original description)
Amellus hispidus DC. accepted as Amellus alternifolius subsp. alternifolius Roth (original description)
Amellus microglossus DC. (original description)
Amellus nanus DC. (original description)
Amellus rosmarinifolius Poepp. ex DC. accepted as Chiliotrichum rosmarinifolium Less. accepted as Chiliotrichum diffusum (G.Forst.) Kuntze (original description)
Amellus scabridus DC. accepted as Amellus strigosus subsp. scabridus (DC.) Rommel (original description)