| Brickellia rosalesia (DC.) Benth. & Hook. f. ex Hemsl., 1881 |
| Brickellia rosmarinifolia (Vent.) W.A. Weber, 1983 |
| Brickellia rosmarinifolia subsp. chlorolepis (Wooton & Standl.) W.A. Weber, 1983 |
| Brickellia rusbyi A. Gray, 1886 |
| Brickellia saltillensis B.L. Rob., 1907 |
| Brickellia schaffneri (A. Gray) Shinners, 1971 |
| Brickellia scoparia (DC.) A. Gray, 1852 |
| Brickellia scoparia var. scoparia (DC.) A. Gray, 1852 |
| Brickellia scoparia var. subauriculata B.L. Rob., 1911 |
| Brickellia secundiflora (Lag.) A. Gray, 1852 |
| Brickellia secundiflora var. monticola McVaugh, 1972 |
| Brickellia secundiflora var. nepetifolia (Kunth) B.L. Rob., 1917 |
| Brickellia secundiflora var. parryi (A. Gray) B.L. Turner, 1989 |
| Brickellia secundiflora var. secundiflora (Lag.) A. Gray, 1852 |
| Brickellia seemannii A. Gray, 1879 |
| Brickellia serboana B.L. Turner, 2013 |
| Brickellia shineri M.E. Jones ex Flyr, 1968 |
| Brickellia simplex A. Gray, 1853 |
| Brickellia solidaginifolia A. Gray, 1886 |
| Brickellia sonorana B.L. Turner, 1991 |