| Sidastrum burrerense Fryxell, León de la Luz & M.Domínguez, 1997 |
| Sidastrum lodiegense (Baker f.) Fryxell, 1978 |
| Sidastrum paniculatum (L.) Fryxell, 1978 |
| Sidastrum strictum (Standl.) Fryxell, 1978 |
| Sidastrum tehuacanum (Brandegee) Fryxell, 1978 |
| Sphaeralcea A. St.-Hil., 1825 |
| Sphaeralcea ambigua A. Gray, 1887 |
| Sphaeralcea angustifolia (Cav.) G. Don, 1831 |
| Sphaeralcea axillaris S. Watson, 1889 |
| Sphaeralcea axillaris var. axillaris S. Watson, 1889 |
| Sphaeralcea axillaris var. violacea (Rose) Wiggins, 1964 |
| Sphaeralcea coccinea (Nutt.) Rydb., 1913 |
| Sphaeralcea coulteri (S. Watson) A. Gray, 1887 |
| Sphaeralcea digitata (Greene) Rydb., 1913 |
| Sphaeralcea emoryi Torr. ex A. Gray, 1849 |
| Sphaeralcea endlichii Ulbr., 1913 |
| Sphaeralcea fendleri A. Gray, 1852 |
| Sphaeralcea fruticosa Brandegee, 1912 |
| Sphaeralcea fulva Greene, 1888 |
| Sphaeralcea galeottii Turcz., 1858 |