| Castilleja altorum Standl. & Steyerm., 1944 |
| Castilleja angustata (B.L. Rob. & Seaton) Eastw., 1909 |
| Castilleja angustifolia M. Martens & Galeotti, 1845 |
| Castilleja angustifolia (Nutt.) G. Don, 1838 |
| Castilleja angustifolia var. dubia A. Nelson, 1902 |
| Castilleja applegatei Fernald, 1898 |
| Castilleja arvensis Schltdl. & Cham., 1830 |
| Castilleja aspera Eastw., 1909 |
| Castilleja attenuata (A. Gray) T.I. Chuang & Heckard, 1991 |
| Castilleja aurea B.L. Rob. & Greenm., 1896 |
| Castilleja auriculata Eastw., 1909 |
| Castilleja auriculata var. auriculata Eastw., 1909 |
| Castilleja auriculata var. verecunda G.L. Nesom, 1992 |
| Castilleja bella Standl., 1940 |
| Castilleja bryantii Brandegee, 1889 |
| Castilleja californica Abrams, 1902 |
| Castilleja canescens Benth., 1846 |
| Castilleja chiapensis Brandegee, 1914 |
| Castilleja chlorosceptron G.L. Nesom, 1992 |
| Castilleja communis Benth., 1846 |