| Hofmeisteria pluriseta A. Gray, 1857 |
| Hofmeisteria pluriseta var. pauciseta I.M. Johnst., 1924 |
| Hofmeisteria pubescens S. Watson, 1889 |
| Hofmeisteria schaffneri (A. Gray) R.M. King & H. Rob., 1966 |
| Hofmeisteria sinaloensis Gentry, 1948 |
| Hofmeisteria standleyi (S.F. Blake) R.M. King & H. Rob., 1966 |
| Hofmeisteria tenuis (S. Watson) I.M. Johnst., 1924 |
| Hofmeisteria urenifolia (Hook. & Arn.) Walp., 1846 |
| Hofmeisteria urenifolia var. mexiae (B.L. Rob.) McVaugh, 1972 |
| Hofmeisteria urenifolia var. urenifolia (Hook. & Arn.) Walp., 1846 |
| Hofmeisteriinae R.M. King & H. Rob., 1980 |
| Holocarpha Greene, 1897 |
| Holocarpha virgata (A. Gray) D.D. Keck, 1958 |
| Holocheilus Cass., 1818 |
| Homochrominae Benth. & Hook. f., 1873 |
| Hopkirkia Spreng., 1818 |
| Hulsea Torr. & A. Gray, 1858 |
| Hulsea brevifolia A. Gray, 1868 |
| Hulsea californica Torr. & A. Gray, 1858 |
| Hulsea mexicana Rydb., 1914 |