| Salicaceae | |
Populus tremuloides var. aurea
| (Tidestr.) Daniels | Fl. Boulder 265 | 1911 |
| Salicaceae | |
Populus tremuloides var. intermedia
| Vict. | Contr. Lab. Bot. Univ. Montréal 16: 8–10, f. 2 [upper right] | 1930 |
| Salicaceae | |
Populus tremuloides var. magnifica
| Vict. | Contr. Lab. Bot. Univ. Montréal 16: 10–11, f. 2 [upper left] | 1930 |
| Salicaceae | |
Populus tremuloides fo. pendula
| Jaeger & Beissner | | |
| Salicaceae | |
Populus tremuloides fo. reniformis
| Tidestr. | Rhodora 16(192): 206 | 1914 |
| Salicaceae | |
Populus tremuloides var. rhomboidea
| Vict. | Contr. Lab. Bot. Univ. Montréal 16: 10, f. 2 [lower left] | 1930 |
| Salicaceae | |
Populus tremuloides fo. tremuloides
| | | |
| Salicaceae | |
Populus tremuloides var. tremuloides
| | | |
| Salicaceae | |
Populus tremuloides var. vancouveriana
| (Trel.) Sarg. | Bot. Gaz. 67: 208 | 1919 |