| Polystemma canisferum McDonnell & Fishbein, 2016 |
| Polystemma cordatum (Brandegee) L.O. Alvarado, 2021 |
| Polystemma cordifolium (A. Gray) McDonnell Fishbein, 2017 |
| Polystemma fishbeiniana V.W. Steinm. & W.D. Stevens, 2022 |
| Polystemma guatemalense (Schltr.) W.D. Stevens, 2005 |
| Polystemma leopardum L.O. Alvarado, García-Mend., D. Sandoval & Lozada-Pérez, 2024 |
| Polystemma magallanesii (E.J. Lott) Morillo, 2023 |
| Polystemma margaritadelacerdae J. Martínez, L.O. Alvarado & Ocampo, 2024 |
| Polystemma mirandae Lozada-Pérez, 2010 |
| Polystemma quercetorum (Standl.) Morillo, 2023 |
| Polystemma scopulorum Brandegee, 1915 |
| Polystemma stevensii G.M.Hern.-Barón, Trujillo-Juárez & V.W. Steinm., 2023 |
| Polystemma viridiflorum Decne., 1844 |
| 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 |