Centauropsis decaryi Humbert (original description)
Centauropsis laurifolia Humbert (original description)
Helichrysum ambondrombeense Humbert (original description)
Helichrysum neoachyroclinoides Humbert (original description)
Helichrysum neoisalense Humbert (original description)
Helichrysum sambiranense Humbert (original description)
Senecio ambondrombeensis Humbert accepted as Io ambondrombeensis (Humbert) B.Nord. (original description)
Senecio ambositrensis Humbert (original description)
Vernonia ambolensis Humbert (original description)
Vernonia ambrensis Humbert (original description)
Vernonia ampandrandavensis Humbert (original description)
Vernonia andrangovalensis Humbert accepted as Gymnanthemum andrangovalense (Humbert) H.Rob. (original description)
Vernonia bathiaei Humbert (original description)
Vernonia beforonensis Humbert accepted as Gymnanthemum humblotii (Drake) H.Rob. (original description)
Vernonia carnotiana Humbert (original description)
Vernonia coursii Humbert accepted as Gymnanthemum coursii (Humbert) H.Rob. (original description)
Vernonia fandrarazanensis Humbert (original description)
Vernonia glandulicincta Humbert (original description)
Vernonia homollei Humbert (original description)
Vernonia ibityensis Humbert accepted as Distephanus ibityensis (Humbert) V.A.Funk & H.Rob. (original description)
Vernonia leandrii Humbert (original description)
Vernonia lemurica Humbert (original description)
Vernonia majungensis Humbert accepted as Distephanus majungensis (Humbert) H.Rob. & B.Kahn (original description)
Vernonia manambolensis Humbert accepted as Distephanus manambolensis (Humbert) H.Rob. & B.Kahn (original description)
Vernonia mandrarensis Humbert (original description)
Vernonia manongarivensis Humbert (original description)
Vernonia monantha Humbert (original description)
Vernonia pseudoappendiculata Humbert (original description)
Vernonia pseudocentauropsis Huntbert (original description)
Vernonia quartziticola Humbert accepted as Distephanus quartziticola (Humbert) V.A.Funk & H.Rob. (original description)
Vernonia seyrigii Humbert (original description)
Vernonia subcrassulescens Humbert accepted as Gymnanthemum subcrassulescens (Humbert) H.Rob. (original description)
Vernonia tropophila Humbert (original description)
Vernonia vohemarensis Humbert (original description)