| Aegopodium L., 1753 |
| Aethusa L., 1753 |
| Aethusa cynapium L., 1753 |
| Aletes J.M. Coult. & Rose, 1888 |
| Aletes acaulis J.M. Coult. & Rose, 1888 |
| Aletes calcicola Mathias & Constance, 1979 |
| Ammi L., 1753 |
| Ammi majus L., 1753 |
| Ammi visnaga (L.) Lam., 1778 |
| Ammoselinum Torr. & A. Gray, 1857 |
| Ammoselinum giganteum J.M. Coult. & Rose, 1900 |
| Ammoselinum popei Torr. & A. Gray, 1857 |
| Anethum L., 1753 |
| Anethum foeniculum L., 1753 |
| Anethum graveolens L., 1753 |
| Angelica L., 1753 |
| Angelica mexicana Vatke, 1876 |
| Angelica nelsonii J.M. Coult. & Rose, 1895 |
| Angelica polycarpa J.M. Coult. & Rose, 1900 |
| Anthriscus Pers., 1805 |