Los géneros con mayor riqueza de especies son "Senecio" (1000), "Eupatorium" "sensu lato" (1200; 40 en sentido estricto), "Helichrysum" (600), "Artemisia" (550), "Mikania" (430), "Baccharis" (400), "Verbesina" (300), "Ageratina" (290), "Bidens" (235), "Stevia" (235), "Anthemis" (210), "Erigeron" (200), "Pentacalia" (200), "Aster" (180), "Viguiera" (180), "Chromolaena" (165), "Gnaphalium" (150), "Solidago" (150), "Tanacetum" (150), "Olearia" (130), "Seriphidium" (130), "Ligularia" (125), "Achillea" (115), "Coreopsis" (115), "Anaphalis" (110), "Brickellia" (110), "Calea" (110), "Koanophyllum" (110), "Blumea" (100), "Euryops" (100), "Pectis" (100) y "Wedelia" (100).