| Quakers |
| Poplars |
| Some poplars |
| Some quakers |
| Poplar trees |
| Shaking trees |
| Trembly trees |
| Fluttery trees |
| Quaking" trees |
| Forest quakers |
| Poplar cousins |
| Certain poplars |
| Resort and tree |
| Quivering trees |
| Trembling trees |
| Arboreal quakers |
| Colorado quakers |
| Poplar varieties |
| Shimmering trees |
| Fluttering trees |
| Fluttery poplars |
| Trees with catkins |
| Quakers in forests? |
| Sources of pulpwood |
| Sights on ski slopes |
| Quakers in the woods? |
| Rocky Mountain sights |
| Quakers in the forest |
| Rocky Mountain quakers |
| Trees used for matches |
| White poplar relatives |
| Spectacular autumn trees |
| Quakers with deep roots? |
| Trees with quaking leaves |
| Trees with trembly leaves |
| They tremble in the breeze |
| Trees with trembling leaves |
| Common sights in the Rockies |
| They're used to make matches |
| Trees with trembling foliage |
| Ones trembling not out of fear |
| Poplars with fluttering leaves |
| Sources of woods used for saunas |
| Trees with sawtooth-edged leaves |
| Trees of the species Populus tremula |
| Classic nature subjects for Ansel Adams |
| Trees with the Latin name Populus tremuloides |
| Quaking" trees for which a ski resort in Colorado is named |