Conyza attenuata var. hispidula Humbert (original description)
Conyza virgata var. ellisii (Baker) Humbert (original description)
Dichrocephala latifolia var. mollis Humbert (original description)
Emilia citrina var. angustifolia Humbert accepted as Emilia infralignosa Humbert (original description)
Emilia graminea var. latifolia Humbert accepted as Emilia crepidioides Garab. (original description)
Epallage dentata var. disciformis Humbert (original description)
Epallage dentata var. homogama Humbert (original description)
Epallage dentata var. incisa Humbert accepted as Epallage dentata var. dentata (original description)
Epallage dentata var. rupestris (DC.) Humbert accepted as Anisopappus chinensis var. dentatus (DC.) S.Ortiz, Paiva & Rodr.Oubiña (original description)
Epallage humifusa var. minor Humbert (original description)
Gnaphalium luteoalbum var. diffusum (Baker) Humbert (original description)
Helichrysum achryroclinoides var. auriculatum Humbert accepted as Helichrysum achryroclinoides subvar. auriculatum (Humbert) Humbert (original description)
Helichrysum achryroclinoides var. latifolium Humbert accepted as Helichrysum achryroclinoides subvar. latifolium (Humbert) Humbert (original description)
Helichrysum adhaerens var. leiophyllum Humbert (original description)
Helichrysum benthamii var. stenocladum (Baker) Humbert accepted as Helichrysum benthamii R.Vig. & Humbert (original description)
Helichrysum bracteiferum subsp. andringitranum Humbert (original description)
Helichrysum bracteiferum subsp. tsaratananense Humbert (original description)
Helichrysum fulvescens var. patulum (Baker) Humbert (original description)
Helichrysum luzulaefolium var. brevifolium Humbert accepted as Helichrysum luzulaefolium DC. (original description)
Helichrysum madagascariense var. dunense Humbert (original description)
Helichrysum mirabile var. compactum Humbert (original description)
Helichrysum rusillonii var. cuneatum Humbert accepted as Helichrysum faradifani Scott-Elliot (original description)
Iphiona ilicifolia Benth. ex Humbert (original description)
Lactuca pauciflora (Baker) Humbert accepted as Launaea rarifolia (Oliv. & Hiern) Boulos (original description)
Laggera alata var. salvifolia (Bory) Humbert (original description)
Pluchea grevei var. congesta Humbert accepted as Pluchea grevei (Baill.) Humbert (original description)
Pluchea tomentosa var. transiens Humbert (original description)
Psiadia altissima subsp. angustifolia Humbert accepted as Psiadia angustifolia (Humbert) Humbert (original description)
Psiadia altissima subsp. coarctata Humbert accepted as Psiadia coarctata (Humbert) Humbert (original description)
Psiadia altissima subsp. serrata Humbert accepted as Psiadia serrata (Humbert) Humbert (original description)
Psiadia altissima var. andringitrensis Humbert (original description)
Psiadia altissima var. boinensis Humbert accepted as Psiadia altissima var. occidentalis Humbert (original description)
Psiadia altissima var. cloiselii Humbert accepted as Psiadia angustifolia (Humbert) Humbert (original description)
Psiadia altissima var. decurrens (Klatt) Humbert (original description)
Psiadia altissima var. latifolia Humbert accepted as Psiadia glutinosa Jacq. (original description)
Psiadia altissima var. linearis Humbert accepted as Psiadia angustifolia subsp. linearis (Humbert) Humbert (original description)
Psiadia altissima var. occidentalis Humbert (original description)
Psiadia altissima var. stenophylla (Baker) Humbert (original description)
Psiadia volubilis (DC.) Baill. ex Humbert (original description)
Psiadiella humilis var. linearifolia Humbert (original description)
Senecio barorum var. ellipticus Humbert accepted as Senecio barorum Humbert (original description)
Senecio emirnensis var. angavonensis (Bojer ex DC.) Humbert (original description)
Senecio emirnensis var. vittarifolius (Bojer ex DC.) Humbert (original description)
Senecio leucopappus (DC.) Bojer ex Humbert accepted as Humbertacalia leucopappa (Bojer ex DC.) C.Jeffrey (original description)
Senecio leucopappus var. volutus (Baker) Humbert (original description)
Senecio madagascariensis var. boutonii (Baker) Humbert (original description)
Senecio myricaefolius (Bojer ex DC.) (original description)
Senecio myricaefolius var. alleizettei Humbert accepted as Senecio alleizettei (Humbert) Humbert (original description)
Senecio myricaefolius var. discoideus Humbert (original description)
Senecio penicillatus var. glabrescens Humbert (original description)
Senecio riparius var. ericifolius Humbert (original description)
Senecio rosellatus var. olivaceus (Klatt) Humbert accepted as Senecio olivaceus Klatt (original description)
Sigesbeckia bojeri (DC.) Humbert (original description)
Wedelia elongata var. cuneata Humbert (original description)