| Betulaceae | |
Corylus rostrata var. californica
| A. DC. | Prodr. 16(2[1]): 133 | 1864 |
| Betulaceae | |
Corylus rostrata var. fargesii
| Franch. | J. Bot. (Morot) 13(7): 199–200 | 1899 |
| Betulaceae | |
Corylus rostrata var. mandshurica
| (Maxim.) Regel | Bull. Cl. Phys.-Math. Acad. Imp. Sci. Saint-Pétersbourg 27: 538 | 1881 |
| Betulaceae | |
Corylus rostrata var. mitis
| Maxim. | Bull. Acad. Imp. Sci. Saint-Petersbourg, sér. 3 27: 539 | 1881 |
| Betulaceae | |
Corylus rostrata var. sieboldiana
| (Blume) Maxim. | Bull. Acad. Imp. Sci. Saint-Petersbourg, sér. 3 27: 538 | 1881 |
| Betulaceae | |
Corylus rostrata var. tracyi
| Jeps. | Man. Fl. Pl. Calif. 271 | 1923 |