Notes:
Genus in need of complete revision in Madagascar, the limits of the published species are far from clear. A list of names with brief notes is provided here. The genus Conocalyx may need to fall into synonymy under Isoglossa (Kiel et al, 2006). The African I. hypoestiflora Lindau (under its synonym Peristrophe tridentata) was mentioned as present in Madagascar by Palacky (1906-1907), the presence of this species has not been confirmed.
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