Cyanthillium is a genus of tropical plants in the ironweed tribe within the sunflower family. Species \n* Cyanthillium albicans (DC.) H.Rob. - southwestern India \n* Cyanthillium cinereum (L.) H.Rob. - tropical Asia + tropical Africa; naturalized in tropical Americas including Florida \n* Cyanthillium conyzoides (DC.) H.Rob. - southwestern India \n* Cyanthillium hookerianum (Arn.) H.Rob. - Sri Lanka \n* Cyanthillium patulum (Dryand. ex Dryand.) H.Rob. - tropical Asia, Madagascar \n* Cyanthillium stelluliferum (Benth.) H.Rob. - tropical Africa \n* Cyanthillium vernonioides (Muschl.) H.Rob. - central Africa \n* Cyanthillium wollastonii (S.Moore) H.Rob. - East Africa