Related Clues:

• Balsam, e.g.
• Needle-leafed tree
• Mature acorn
• Squirrels' hangout
• Plywood source
• Picnic shader, perhaps
• Dec. 25
• Wood in archery bows
• See 28 Across
• Maryland emblem
• Massachusetts symbol
• Symbol of sturdiness
• Solid wood
• Grand opening day?
• Pine relative