Senecio aberrans Greenm. (original description)
Senecio alternifolius (Sch.Bip. ex Rusby) Greenm. accepted as Nordenstamia repanda (Wedd.) Lundin (original description)
Senecio arboreus (Kunth) Greenm. accepted as Pentacalia arborea (Kunth) H.Rob. & Cuatrec. (original description)
Senecio aridus Greenm. (original description)
Senecio buchtienii Greenm. accepted as Dendrophorbium buchtienii (Greenm.) C.Jeffrey (original description)
Senecio chaquiroensis Greenm. accepted as Pentacalia chaquiroensis (Greenm.) Cuatrec. (original description)
Senecio genuflexus Greenm. accepted as Pentacalia genuflexa (Greenm.) Cuatrec. (original description)
Senecio lophophilus Greenm. accepted as Pentacalia lophophilus (Greenm.) Cuatrec. (original description)
Senecio medullosus Sch.Bip. ex Greenm. accepted as Dendrophorbium medullosum (Sch.Bip. ex Greenm.) C.Jeffrey (original description)
Senecio pennellii Greenm. accepted as Pentacalia kleinioides (Kunth) Cuatrec. (original description)
Senecio pennellii var. gachetensis Greenm. (original description)
Senecio pericaulis Greenm. accepted as Dendrophorbium pericaule (Greenm.) B.Nord. (original description)
Senecio sanctae-martae Greenm. (original description)
Senecio scortifolius Greenm. accepted as Pentacalia scortifolia (Greenm.) Cuatrec. (original description)
Senecio subglomerosus Greenm. accepted as Pentacalia subglomerosa (Greenm.) Cuatrec. (original description)
Senecio subruncinatus (Wedd.) Greenm. (original description)
Senecio sylvicola Greenm. (original description)