Related Clues:

• Members of the birch family
• Trees with sawtooth-edged leaves
• Pulpwood source
• Trembling trees
• Charcoal wood sources
• Certain poplars
• Poplar trees
• Birch family trees
• Birches' kin
• Birch-tree relatives
• Some quakers
• Quivering trees
• They tremble in the breeze
• Shimmering trees
• Trees with trembling leaves