| Prestonia R. Br., 1810 |
| Prestonia amanuensis Woodson, 1936 |
| Prestonia clandestina J.F. Morales, 1997 |
| Prestonia concolor (S.F. Blake) Woodson, 1936 |
| Prestonia contorta (M. Martens & Galeotti) Hemsl., 1881 |
| Prestonia grandiflora L.O. Williams, 1968 |
| Prestonia guatemalensis Woodson, 1936 |
| Prestonia langlassei Standl., 1924 |
| Prestonia longifolia (Sessé & Moc.) J.F. Morales, 1996 |
| Prestonia mexicana A. DC., 1844 |
| Prestonia portobellensis (Beurl.) Woodson, 1931 |
| Prestonia sericea M. Martens & Galeotti, 1844 |
| Prestonia speciosa Donn. Sm., 1899 |
| Prestonia woodsoniana (Monach.) A.H. Gentry, 1983 |
| Prestoniinae Pichon ex M.E. Endress, 2014 |
| Prosthecidiscus Donn. Sm., 1898 |
| Prosthecidiscus guatemalensis Donn. Sm., 1898 |
| Pseudomarsdenia Baill., 1890 |
| Pseudomarsdenia bourgeana Baill., 1890 |
| Pseudomarsdenia lanata Paul G. Wilson, 1958 |