| Lamourouxia tepicana (M.E. Jones) Pennell, 1945 |
| Lamourouxia viscosa Kunth, 1818 |
| Lamourouxia xalapensis Kunth, 1818 |
| Lindenbergieae T. Yamaz., 1985 |
| Lyncea Schltdl. & Cham., 1830 |
| Lyncea hispida (Benth.) Schltdl. & Cham., 1830 |
| Melasma Bergius, 1767 |
| Melasma hispidum (Schltdl. & Cham.) Benth., 1835 |
| Melasma physalodes (D. Don) Melch., 1940 |
| Myzorrhiza Phil., 1858 |
| Myzorrhiza californica (Cham. & Schltdl.) Rydb., 1909 |
| Myzorrhiza cooperi (A. Gray) Rydb., 1909 |
| Myzorrhiza ludoviciana (Nutt.) Rydb., 1903 |
| Ophiocephalus Wiggins, 1933 |
| Ophiocephalus angustifolius Wiggins, 1933 |
| Orobanchaceae Vent., 1799 |
| Orobanche L., 1753 |
| Orobanche bulbosa Beck, 1890 |
| Orobanche cooperi (A. Gray) A. Heller, 1898 |
| Orobanche dugesii (S. Watson) Munz, 1931 |