| Brickellia lanata (DC.) A. Gray, 1852 |
| Brickellia lanata var. lanata (DC.) A. Gray, 1852 |
| Brickellia lanata var. microdonta B.L. Rob., 1917 |
| Brickellia lancifolia B.L. Rob. & Greenm., 1895 |
| Brickellia laxiflora (Brandegee) B.L. Turner, 1991 |
| Brickellia lemmonii A. Gray, 1882 |
| Brickellia lemmonii var. carmenensis B.L. Turner, 1990 |
| Brickellia lemmonii var. conduplicata (B.L. Rob.) B.L. Turner, 1990 |
| Brickellia lemmonii var. lemmonii A. Gray, 1882 |
| Brickellia lemmonii var. nelsonii (B.L. Rob.) B.L. Turner, 1990 |
| Brickellia lemmonii var. wootonii (Greene) B.L. Rob., 1917 |
| Brickellia leonis Rzed. & Calderón, 2013 |
| Brickellia leptophylla (Scheele) Shinners, 1971 |
| Brickellia leptophylla var. leptophylla (Scheele) Shinners, 1971 |
| Brickellia leptophylla var. mexicana (Scheele) Shinners, 1971 |
| Brickellia lewisii B.L. Turner, 1985 |
| Brickellia macromera B.L. Rob., 1917 |
| Brickellia magnifica McVaugh, 1972 |
| Brickellia mcdonaldii B.L. Turner, 1985 |
| Brickellia megalodonta Greenm., 1904 |