Conyza ageratoides var. andohahelensis (Humbert) Humbert (original description)
Conyza ageratoides var. rugulosa (Humbert) Humbert (original description)
Psiadia altissima subvar. alatipetiolata Humbert (original description)
Psiadia angustifolia subsp. linearis (Humbert) Humbert (original description)
Psiadia nigrescens var. ciliata (Humbert) Humbert (original description)
Psiadia nigrescens var. latifolia (Humbert) Humbert (original description)
Psiadiella humilis subvar. sciaphila Humbert (original description)
Psiadiella humilis var. hirsutissima Humbert (original description)
Vernonia antanala var. mangorensis (Humbert) Humbert (original description)
Vernonia betonicaefolia subvar. sericea Humbert (original description)
Vernonia cinerea subsp. vialis (DC.) Humbert (original description)
Vernonia diversifolia f. catatii (Drake) Humbert (original description)
Vernonia diversifolia subsp. bechioides (Klatt) Humbert (original description)
Vernonia diversifolia subsp. ikopae (Drake) Humbert (original description)
Vernonia grandis var. comorensis Humbert (original description)
Vernonia grandis var. obtusata Humbert (original description)
Vernonia hispidula var. glabriuscula Humbert (original description)
Vernonia hispidula var. ivohibeensis (Humbert) Humbert (original description)
Vernonia humblotii var. angustibracteata Humbert (original description)
Vernonia lastellei var. bernieri (Drake) Humbert (original description)
Vernonia pachyclada var. fuscopilosa (Baker) Humbert (original description)
Vernonia pectoralis var. delphinensis Humbert (original description)
Vernonia spiciformis var. microcephala Humbert (original description)
Vernoniopsis caudata subvar. microcephala Humbert (original description)