| Asclepias subverticillata (A. Gray) Vail, 1898 |
| Asclepias syriaca L., 1762 |
| Asclepias texana A. Heller, 1895 |
| Asclepias tuberosa L., 1753 |
| Asclepias uncialis Greene, 1880 |
| Asclepias vinosa (E. Fourn.) Woodson, 1954 |
| Asclepias viridiflora Raf., 1808 |
| Asclepias virletii E. Fourn., 1882 |
| Asclepias woodsoniana Standl. & Steyerm., 1947 |
| Asclepias wrightii Greene ex A. Gray, 1881 |
| Asclepias zacatecana McVaugh, 1978 |
| Asclepias zanthodacryon (L.B. Sm.) Woodson, 1941 |
| Aspidosperma Mart. & Zucc., 1824 |
| Aspidosperma chiapense Matuda, 1950 |
| Aspidosperma cruentum Woodson, 1935 |
| Aspidosperma desmanthum Benth. ex Müll. Arg., 1860 |
| Aspidosperma matudae Lundell, 1939 |
| Aspidosperma megalocarpon Müll. Arg., 1860 |
| Aspidosperma megalocarpon subsp. megalocarpon Müll. Arg., 1860 |
| Aspidosperma spruceanum Benth. ex Müll. Arg., 1860 |