| Parent | Category | Figures | |
|---|---|---|---|
| 1 | Alnus | incana | 1017 |
| 2 | Alnus | rubra | 829 |
| 3 | Alnus | rhombifolia | 680 |
| 4 | Alnus | glutinosa | 528 |
| 5 | Alnus | serrulata | 314 |
| 6 | Alnus | viridis | 293 |
| 7 | Alnus | acuminata | 129 |
| 8 | Alnus | cordata | 35 |
| 9 | Alnus | alnobetula | 34 |
| 10 | Alnus | jorullensis | 25 |
| 11 | Alnus | oblongifolia | 15 |
| 12 | Alnus | sieboldiana | 8 |
| 13 | Alnus | maritima | 8 |
| 14 | Alnus | hirsuta | 7 |
| 15 | Alnus | nepalensis | 6 |
| 16 | Alnus | x | 2 |
| 17 | Alnus | maximowiczii | 2 |
| 18 | Alnus | pendula | 2 |
| 19 | Alnus | mandshurica | 1 |
| 20 | Alnus | japonica | 1 |
| 21 | Alnus | firma | 1 |
| 22 | Alnus | orientalis | 1 |
| 23 | Alnus | formosana | 1 |