| Betulaceae | |
Betula microphylla var. ebinurica
| C.Y. Yang & W.H. Li | Bull. Bot. Res., Harbin 26(6): 653, f. 2 | 2006 |
| Betulaceae | |
Betula microphylla var. fontinalis
| (Sarg.) M.E. Jones | Contr. W. Bot. 12: 77 | 1908 |
| Betulaceae | |
Betula microphylla var. harasiica
| C.Y. Yang | Bull. Bot. Res., Harbin 26(6): 651–652, f. 2 | 2006 |
| Betulaceae | |
Betula microphylla var. latibracteata
| C.Y. Yang | Bull. Bot. Res., Harbin 26(6): 649–650, f. 1 | 2006 |
| Betulaceae | |
Betula microphylla var. microphylla
| | | |
| Betulaceae | |
Betula microphylla var. occidentalis
| (Hook.) M.E. Jones | Contr. W. Bot. 12: 77 | 1908 |
| Betulaceae | |
Betula microphylla var. paludosa
| C.Y. Yang & Jian Wang | Bull. Bot. Res., Harbin 26(6): 652–653 | 2006 |
| Betulaceae | |
Betula microphylla var. rezniczenkoana
| Litv. | Trudy Bot. Muz. Imp. Akad. Nauk 12: 97 | 1914 |
| Betulaceae | |
Betula microphylla var. tumantica
| C.Y. Yang & Jian Wang | Bull. Bot. Res., Harbin 26(6): 653, f. 3 | 2006 |
| Betulaceae | |
Betula microphylla var. utahensis
| (Britton) M.E. Jones | Contr. W. Bot. 13: 22 | 1910 |