| Acourtia turbinata (La Llave & Lex.) Reveal & R.M. King, 1973 |
| Acourtia umbratilis (B.L. Rob. & Greenm.) B.L. Turner, 1978 |
| Acourtia venturae L. Cabrera, 2001 |
| Acourtia veracruzana B.L. Turner, 1993 |
| Acourtia wislizeni (A. Gray) Reveal & R.M. King, 1973 |
| Acourtia wislizeni var. megacephala (A. Gray) Reveal & R.M. King, 1973 |
| Acourtia wislizeni var. subscaposa B.L. Turner, 1993 |
| Acourtia wislizeni var. wislizeni (A. Gray) Reveal & R.M. King, 1973 |
| Acourtia wrightii (A. Gray) Reveal & R.M. King, 1973 |
| Acourtia zacatecana B.L. Turner, 1993 |
| Acroptilon Cass., 1827 |
| Acroptilon repens (L.) DC., 1838 |
| Actinea Juss., 1803 |
| Actinea chrysanthemoides Kunth, 1818 |
| Actinella Pers., 1807 |
| Actinella insignis A. Gray ex S. Watson, 1883 |
| Actinella lanata Pursh, 1814 |
| Actinella palmeri A. Gray, 1883 |
| Actinomeris Nutt., 1818 |
| Actinomeris longifolia A. Gray, 1853 |