Possible Clues:

• Grow more rigid
• One may be deciduous
• Would be this in a sound sort of way
• Pro French, is protected by conservationists?
• Because it is in Latin, 27 across may be there
• Woodland in autumn before storm damage
• Mount _______ , Ontario
• K) It's full of trees
• See 15
• Would sound like this because it is in Latin