| Celaenodendron Standl., 1927 |
| Celaenodendron mexicanum Standl., 1927 |
| Picrodendraceae Small, 1917 |
| Picrodendreae Fawc. & Rendle, 1920 |
| Piranhea Baill., 1866 |
| Piranhea mexicana (Standl.) Radcl.-Sm., 1996 |
| Podocalyceae G.L. Webster, 1994 |
| Tetracoccus Engelm. ex Parry, 1885 |
| Tetracoccus capensis (I.M. Johnst.) Croizat, 1942 |
| Tetracoccus dioicus Parry, 1885 |
| Tetracoccus engelmannii S. Watson, 1885 |
| Tetracoccus fasciculatus (S. Watson) Croizat, 1942 |
| Tetracoccus fasciculatus var. fasciculatus (S. Watson) Croizat, 1942 |
| Tetracoccus fasciculatus var. hallii (Brandegee) Dressler, 1954 |
| Tetracoccus hallii Brandegee, 1906 |