A Massachusetts symbol, 7 letters
Bark beetle's victim, 7 letters
Certain shade giver, 7 letters
Common street planting, 7 letters
Emblem of North Dakota, 7 letters
Home to some bark beetles, 7 letters
Shade source in many Canadian cities, 7 letters
Site of a William Penn treaty with Indians, 7 letters
Source of split-resistant wood, 7 letters
Stately shade source, 7 letters
Stately shade-giver, 7 letters
Stately thing in Browning's Oh, to be in England..., 7 letters
Symbol of Massachusetts, 7 letters
Victim of a Dutch disease, 7 letters
White House adornment destroyed in 2006 but still visible on a $20 bill, 7 letters