| Poincianella recordii (Britton & Rose) Britton & Rose, 1930 |
| Poincianella robinsoniana Britton & Rose, 1930 |
| Poincianella standleyi Britton & Rose, 1930 |
| Poincianella tampicoana Britton & Rose, 1930 |
| Poincianella yucatanensis (Greenm.) Britton & Rose, 1930 |
| Poiretia Vent., 1807 |
| Poiretia punctata (Willd.) Desv., 1813 |
| Poiretia scandens Vent., 1807 |
| Pomaria Cav., 1799 |
| Pomaria austrotexana B.B. Simpson, 1998 |
| Pomaria canescens (Fisher) B.B. Simpson, 1998 |
| Pomaria fruticosa (S. Watson) B.B. Simpson, 1998 |
| Pomaria glandulosa Cav., 1799 |
| Pomaria humilis M. Martens & Galeotti, 1843 |
| Pomaria jamesii (Torr. & A. Gray) Walp., 1843 |
| Pomaria melanosticta S. Schauer, 1847 |
| Pomaria multijuga (S. Watson) B.B. Simpson, 1998 |
| Pomaria wootonii (Britton) B.B. Simpson, 1998 |
| Poponax Raf., 1838 |
| Poponax attenuata Britton & Rose, 1928 |