| Zexmenia trachylepis Hemsl., 1881 |
| Zexmenia villosa Pol., 1877 |
| Zexmenia virgulta Klatt, 1892 |
| Zexmenia xylopoda W.W. Jones, 1905 |
| Zexmenia zinnioides Hemsl., 1881 |
| Zinnia L., 1759 |
| Zinnia acerosa (DC.) A. Gray, 1852 |
| Zinnia acerosa var. acerosa (DC.) A. Gray, 1852 |
| Zinnia acerosa var. guanajuatensis Calderón & Rzed., 1996 |
| Zinnia americana (Mill.) Olorode & A.M. Torres, 1970 |
| Zinnia angustifolia Kunth, 1818 |
| Zinnia angustifolia var. angustifolia Kunth, 1818 |
| Zinnia angustifolia var. greggii (B.L. Rob. & Greenm.) McVaugh, 1972 |
| Zinnia angustifolia var. littoralis (B.L. Rob. & Greenm.) B.L. Turner, 1990 |
| Zinnia anomala A. Gray, 1852 |
| Zinnia australis F.M. Bailey, 1891 |
| Zinnia bicolor (DC.) Hemsl., 1881 |
| Zinnia citrea A.M. Torres, 1960 |
| Zinnia coahuilana B.L. Turner, 2012 |
| Zinnia elegans Jacq., 1793 |