Related Clues:
- Tree known scientifically as Populus tremuloides
- Quaker in the wind
- Wood that doesn't burn easily
- Home to an annual Ideas Festival
- A second writer leaves producer
- Eurasian tree the council finally planted in Lincoln
- Tree that quakes
- ___ Institute (nonpartisan D.C. think tank)
- When writer appears in US ski resort
- Colorado city named for a tree
- Colorado skiing place
- Skiing place in Colorado
- Tree we see while followed by swan
- Poplar family member
- Resort WSW of Denver