| Clethraceae | |
Alloiosepalum
| Gilg | Notizbl. Bot. Gart. Berlin-Dahlem 11: 97 | 1931 |
| Clethraceae | |
Clethra
| L. | Sp. Pl. 1: 396 | 1753 |
| Clethraceae | |
Costaea
| A. Rich. | Hist. Fís. Cuba, Bot. 11: 75 | 1850 |
| Clethraceae | ** |
Costea
| A. Rich. | Hist. Phys. Cuba, Pl. Vasc. 2: 11, 328 | 1853 |
| Clethraceae | ** |
Crossophrys
| Klotzsch | Linnaea 24: 3 | 1851 |
| Clethraceae | |
Cuellara
| Pers. | Syn. Pl. 1: 483 | 1805 |
| Clethraceae | |
Cuellaria
| Ruiz & Pav. | Fl. Peruv. Prodr. 59, t. 10 | 1794 |
| Clethraceae | * |
Gillena
| Adans. | Fam. Pl. 2: 166 | 1763 |
| Clethraceae | * |
Junia
| Adans. | Fam. Pl. 2: 165 | 1763 |
| Clethraceae | |
Kowalewskia
| Turcz. | Bull. Soc. Imp. Naturalistes Moscou 32(1): 263 | 1859 |
| Clethraceae | |
Purdiaea
| Planch. | London J. Bot. 5: 250 | 1846 |
| Clethraceae | |
Schizocardia
| A.C. Sm. & Standl. | Trop. Woods 32: 9 | 1932 |
| Clethraceae | * |
Tinus
| L. | Syst. Nat. (ed. 10) 2: 1009, 1010, 1367 | 1759 |
| Clethraceae | * |
Volkameria
| P. Browne | Civ. Nat. Hist. Jamaica 214, t. 21, f. 1 | 1756 |