Cirsium peltieri Maire (original description)
Senecio canabyi Humbert (original description)
Senecio francoisii Humbert (original description)
Senecio heimii Humbert accepted as Hubertia heimii (Humbert) C.Jeffrey (original description)
Senecio ivohibeensis Humbert accepted as Hubertia ivohibeensis (Humbert) C.Jeffrey (original description)
Senecio kalambatitrensis Humbert (original description)
Senecio lemuricus Humbert accepted as Crassocephalum lemuricum (Humbert) Humbert (original description)
Senecio ogilviae Humbert accepted as Senecio acetosifolius Baker (original description)
Senecio tsaratananensis Humbert (original description)
Syncephalum tsinjoarivense Humbert (original description)
Vernonia antandroy Humbert accepted as Distephanus antandroy (Humbert) H.Rob. & B.Kahn (original description)
Vernonia bara Humbert (original description)
Vernonia mahafaly Humbert accepted as Distephanus mahafaly (Humbert) H.Rob. & B.Kahn (original description)
Vernonia poissonii Humbert accepted as Distephanus poissonii (Humbert) V.A.Funk & H.Rob. (original description)
Vernonia swinglei Humbert accepted as Distephanus swinglei (Humbert) H.Rob. & B.Kahn (original description)