Cyanthillium is a genus of tropical plants in the ironweed tribe within the sunflower family.
SpeciesCyanthillium albicans (DC.) H.Rob. - southwestern IndiaCyanthillium cinereum (L.) H.Rob. - tropical Asia + tropical Africa; naturalized in tropical Americas including FloridaCyanthillium conyzoides (DC.) H.Rob. - southwestern IndiaCyanthillium hookerianum (Arn.) H.Rob. - Sri LankaCyanthillium patulum (Dryand. ex Dryand.) H.Rob. - tropical Asia, MadagascarCyanthillium stelluliferum (Benth.) H.Rob. - tropical AfricaCyanthillium vernonioides (Muschl.) H.Rob. - central AfricaCyanthillium wollastonii (S.Moore) H.Rob. - East Africa