Related Clues:

• Trees with catkins
• Trees with sawtooth-edged leaves
• Pulpwood source
• Trembling trees
• Certain poplars
• Poplar trees
• Some quakers
• Quivering trees
• They tremble in the breeze
• Trees with trembling leaves
• Quaking trees
• Fluttering trees
• Quakers in the woods
• Forest quakers
• Poplars with fluttering leaves