Alnaster
| Alnaster Spach, Ann. Sci. Nat., Bot., ser. 2. 15: 183, 200. 1841. | | TYPE: Alnus viridis Spach, nom. illegit. (Betula viridis Chaix, nom. illegit.; Betula alnobetula Ehrhart) |
Alnobetula
| Alnobetula (W. D. J. Koch) Schur, Verh. Mitth. Siebeguerg Vereins Naturwiss. Hermannstadt 4: 68. 1853. | BASIONYM: Alnus Miller, sect. Alnobetula W. D. J. Koch, Syn. Fl. Germ. Helv., ed. 2. 762. 1844. | TYPE: Alnobetula viridis Schur (Betula viridis Chaix, nom. illegit.; Betula alnobetula Ehrhart) = Alnaster Spach 1841. |
Betula-alnus
| Betula-alnus Marshall, Arbust. Amer. 19. 1785. | | TYPE: Non designatus. |
Clethropsis
| Clethropsis Spach, Ann. Sci. Nat., Bot., ser. 2. 15: 183, 201. 1841. | | TYPE: Non designatus. |
Semidopsis
| Semidopsis Zumaglini, Fl. Pedem. 1: 249. 1849. | | TYPE: Semidopsis viridis Zumaglini, nom. illegit. (Betula viridis Chaix, nom. illegit.; Betula alnobetula Ehrhart) = Alnaster Spach 1841. |