| Hamosa hypoleuca (S. Schauer) Rydb., 1927 |
| Hamosa imperfecta Rydb., 1927 |
| Hamosa leptocarpa (Torr. & A. Gray) Rydb., 1903 |
| Hamosa leptocarpoides (M.E. Jones) Rydb., 1927 |
| Hamosa madrensis (M.E. Jones) Rydb., 1929 |
| Hamosa montereyensis Rydb., 1927 |
| Hamosa nothoxys (A. Gray) Rydb., 1927 |
| Hamosa parva (Hemsl.) Rydb., 1927 |
| Hamosa pringlei (S. Watson) Rydb., 1927 |
| Hamosa vaccarum (A. Gray) Rydb., 1927 |
| Harpalyce Sessé & Moc. ex DC., 1825 |
| Harpalyce arborescens A. Gray, 1862 |
| Harpalyce ferruginea Brandegee, 1906 |
| Harpalyce formosa DC., 1825 |
| Harpalyce formosa var. formosa DC., 1825 |
| Harpalyce formosa var. goldmanii (Rose) Arroyo, 1976 |
| Harpalyce goldmanii Rose, 1905 |
| Harpalyce hidalgensis Taub., 1895 |
| Harpalyce loeseneriana Taub., 1895 |
| Harpalyce macrobotrya Harms, 1909 |