| Orobanche multicaulis Brandegee, 1916 |
| Orobanche multicaulis var. palmeri Munz, 1930 |
| Orobanche parishii (Jeps.) Heckard, 1973 |
| Orobancheae Lam. & DC., 1806 |
| Orthocarpus Nutt., 1818 |
| Orthocarpus attenuatus A. Gray, 1857 |
| Orthocarpus exsertus A. Heller, 1906 |
| Orthocarpus purpurascens Benth., 1835 |
| Pedicularideae Duby, 1828 |
| Pedicularis L., 1753 |
| Pedicularis angustifolia Benth., 1839 |
| Pedicularis canadensis L., 1767 |
| Pedicularis chihuahuensis G.L. Nesom, 1992 |
| Pedicularis densiflora Benth., 1838 |
| Pedicularis eburnata B.L. Rob. & Seaton, 1893 |
| Pedicularis glabra McVaugh & Mellich., 1975 |
| Pedicularis gordonii McVaugh & Koptur, 1978 |
| Pedicularis hintonii McVaugh & Mellich., 1975 |
| Pedicularis mexicana Zucc. ex Benth., 1843 |
| Pedicularis orizabae Schltdl. & Cham., 1830 |