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| poplar quaking aspen (Populus tremula); Swedish aspen (Populus tremula); trembling poplar (Populus tremula); European aspen (Populus tremula) | |||
| aspen (Populus tremula Lin., Populus tremula) | |||
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| American aspen | |||
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| aspen | |||
| peuplier tremble: 8 phrases in 3 subjects |
| Botany | 1 |
| Entomology | 3 |
| Natural resourses and wildlife conservation | 4 |