Ageratum houstonianum f. isochroum B.L.Rob. accepted as Ageratum houstonianum var. muticescens B.L.Rob. (original description)
Ageratum houstonianum f. luteum B.L.Rob. accepted as Ageratum houstonianum Mill. (original description)
Ageratum houstonianum f. niveum B.L.Rob. accepted as Ageratum houstonianum Mill. (original description)
Ageratum houstonianum f. normale B.L.Rob. accepted as Ageratum houstonianum Mill. (original description)
Ageratum houstonianum f. versicolor B.L.Rob. accepted as Ageratum houstonianum var. muticescens B.L.Rob. (original description)
Ageratum houstonianum var. angustatum B.L.Rob. accepted as Ageratum houstonianum Mill. (original description)
Ageratum houstonianum var. typicum B.L.Rob. accepted as Ageratum houstonianum Mill. (original description)
Brickellia gentianoides B.L.Rob. accepted as Chromolaena gentianoides (B.L.Rob.) R.M.King & H.Rob. (original description)
Brickellia kellermanii f. podocephala B.L.Rob. accepted as Brickellia oliganthes (Less.) A.Gray (original description)
Eremonanus I.M.Johnst. accepted as Eriophyllum Lag. (original description)
Eremonanus mohavensis I.M.Johnst. accepted as Eriophyllum mohavense (I.M.Johnst.) Jeps. (original description)
Eupatoriastrum triangulare (DC.) B.L.Rob. (original description)
Eupatorium arthrodes B.L.Rob. accepted as Neomirandea arthodes (B.L.Rob.) R.M.King & H.Rob. (original description)
Eupatorium ascendens var. parcisetosum B.L.Rob. accepted as Chromolaena squarrulosa (Hook. & Arn.) R.M.King & H.Rob. (original description)
Eupatorium ascendens var. typicum B.L.Rob. accepted as Chromolaena ascendens (Sch.Bip. ex Baker) R.M.King & H.Rob. (original description)
Eupatorium austerum B.L.Rob. accepted as Chromolaena austera (B.L.Rob.) R.M.King & H.Rob. (original description)
Eupatorium baccharoides var. fratris B.L.Rob. accepted as Ageratina baccharoides (Kunth) R.M.King & H.Rob. (original description)
Eupatorium brandegeeanum B.L.Rob. accepted as Ageratina brandegeeana (B.L.Rob.) R.M.King & H.Rob. (original description)
Eupatorium calaminthifolium var. irrasum B.L.Rob. accepted as Ageratina irrasa (B.L.Rob.) R.M.King & H.Rob. (original description)
Eupatorium chiquitense B.L.Rob. accepted as Praxelis chiquitensis (B.L.Rob.) R.M.King & H.Rob. (original description)
Eupatorium conspicuum var. pueblense B.L.Rob. accepted as Ageratina grandifolia (Regel) R.M.King & H.Rob. (original description)
Eupatorium conspicuum var. typicum B.L.Rob. accepted as Ageratina grandifolia (Regel) R.M.King & H.Rob. (original description)
Eupatorium costatipes B.L.Rob. accepted as Chromolaena costatipes (B.L.Rob.) R.M.King & H.Rob. (original description)
Eupatorium debeauxii B.L.Rob. accepted as Dasycondylus debeauxii (B.L.Rob.) R.M.King & H.Rob. (original description)
Eupatorium desmocephalum B.L.Rob. accepted as Chromolaena desmocephala (B.L.Rob.) R.M.King & H.Rob. (original description)
Eupatorium enixum B.L.Rob. accepted as Ageratina enixa (B.L.Rob.) R.M.King & H.Rob. (original description)
Eupatorium euphyes B.L.Rob. accepted as Ayapanopsis euphyes (B.L.Rob.) R.M.King & H.Rob. (original description)
Eupatorium funckii B.L.Rob. accepted as Ageratina funckii (B.L.Rob.) R.M.King & H.Rob. (original description)
Eupatorium galeottii B.L.Rob. accepted as Koanophyllon galeottii (B.L.Rob.) R.M.King & H.Rob. (original description)
Eupatorium glaberrimum var. michelianum (B.L.Rob.) B.L.Rob. accepted as Chromolaena glaberrima (DC.) R.M.King & H.Rob. (original description)
Eupatorium herzogii B.L.Rob. accepted as Chromolaena herzogii (B.L.Rob.) R.M.King & H.Rob. (original description)
Eupatorium hilarii B.L.Rob. accepted as Malmeanthus hilarii (B.L.Rob.) R.M.King & H.Rob. (original description)
Eupatorium imitans B.L.Rob. accepted as Fleischmannia imitans (B.L.Rob.) R.M.King & H.Rob. (original description)
Eupatorium lasium B.L.Rob. accepted as Ageratina lasia (B.L.Rob.) R.M.King & H.Rob. (original description)
Eupatorium leucomyelum B.L.Rob. accepted as Ageratina neriifolia (B.L.Rob.) R.M.King & H.Rob. (original description)
Eupatorium macbridei B.L.Rob. accepted as Ageratina macbridei (B.L.Rob.) R.M.King & H.Rob. (original description)
Eupatorium macromeris B.L.Rob. accepted as Bartlettina macromeris (B.L.Rob.) R.M.King & H.Rob. (original description)
Eupatorium mayorii B.L.Rob. accepted as Fleischmannia mayorii (B.L.Rob.) R.M.King & H.Rob. (original description)
Eupatorium molinum B.L.Rob. accepted as Chromolaena molina (B.L.Rob.) R.M.King & H.Rob. (original description)
Eupatorium mollicomum B.L.Rob. accepted as Grazielia mollicoma (B.L.Rob.) R.M.King & H.Rob. (original description)
Eupatorium multifolium B.L.Rob. accepted as Disynaphia ligulaefolia (Hook. & Arn.) R.M.King & H.Rob. (original description)
Eupatorium neglectum B.L.Rob. accepted as Austroeupatorium neglectum (B.L.Rob.) R.M.King & H.Rob. (original description)
Eupatorium ocanense B.L.Rob. accepted as Ageratina ocanensis (B.L.Rob.) R.M.King & H.Rob. (original description)
Eupatorium porophylloides B.L.Rob. accepted as Chromolaena porophylloides (B.L.Rob.) R.M.King & H.Rob. (original description)
Eupatorium praefictum B.L.Rob. accepted as Disynaphia praeficta (B.L.Rob.) R.M.King & H.Rob. (original description)
Eupatorium pumilum (Gardner) B.L.Rob. accepted as Heterocondylus pumilus (Gardner) R.M.King & H.Rob. (original description)
Eupatorium pumilum var. vegetius B.L.Rob. (original description)
Eupatorium pycnocephalum f. glandulitectum B.L.Rob. (original description)
Eupatorium radula var. stenophyllum B.L.Rob. accepted as Disynaphia radula (Chodat) R.M.King & H.Rob. (original description)
Eupatorium sanctopaulense B.L.Rob. accepted as Chromolaena sanctopaulensis (B.L.Rob.) R.M.King & H.Rob. (original description)
Eupatorium urubambense var. determinatum B.L.Rob. accepted as Cronquistianthus determinatus (B.L.Rob.) R.M.King & H.Rob. (original description)
Eupatorium urubambense var. typicum B.L.Rob. accepted as Cronquistianthus urubambensis (B.L.Rob.) R.M.King & H.Rob. (original description)
Gnaphalium nubicola I.M.Johnst. accepted as Pseudognaphalium nubicola (I.M.Johnst.) Anderb. (original description)
Gnaphalium pedunculosum I.M.Johnst. accepted as Gamochaeta sphacelata (Kunth) Cabrera (original description)
Gnaphalium rosaceum I.M.Johnst. accepted as Gamochaeta rosacea (I.M.Johnst.) Anderb. accepted as Gamochaeta purpurea (L.) Cabrera (original description)
Gnaphalium sonorae I.M.Johnst. accepted as Pseudognaphalium sonorae (I.M.Johnst.) Anderb. accepted as Pseudognaphalium canescens (DC.) Anderb. (original description)
Gnaphalium stagnale I.M.Johnst. accepted as Gamochaeta stagnalis (I.M.Johnst.) Anderb. (original description)
Gnaphalium vulcanicum I.M.Johnst. accepted as Pseudognaphalium liebmannii (Sch.Bip. ex Klatt) Anderb. (original description)
Hymenopappus filifolius var. cinereus (Rydb.) I.M.Johnst. (original description)
Hymenopappus flavomarginatus I.M.Johnst. (original description)
Hymenopappus newberryi I.M.Johnst. (original description)
Hymenopappus pauciflorus I.M.Johnst. accepted as Hymenopappus filifolius var. pauciflorus (I.M.Johnst.) B.L.Turner (original description)
Mikania broadwayi B.L.Rob. (original description)
Mikania dictyota B.L.Rob. (original description)
Mikania featherstonei B.L.Rob. (original description)
Mikania oreimeles B.L.Rob. (original description)
Mikania virgata B.L.Rob. (original description)
Symphyopappus myricifolius B.L.Rob. (original description)
Symphyopappus pennivenius B.L.Rob. accepted as Neocabreria pennivenia (B.L.Rob.) R.M.King & H.Rob. (original description)