| Sidalcea neomexicana A. Gray, 1849 |
| Sidalcea sparsifolia (C.L. Hitchc.) S.R. Hill, 2009 |
| Sidanoda (A. Gray) Wooton & Standl., 1915 |
| Sidanoda pentaschista (A. Gray) Wooton & Standl., 1915 |
| Sidastrum Baker f., 1892 |
| 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 |