街路樹

1. Origins, structure, and basic meaning

• Structure: 街路樹 (がいろじゅ) means a tree planted along a street. 街路樹の葉 forms a whole-part relation, whereas 街路樹が色づく predicates a change of the trees themselves.
• Basic usage: The first example focuses on leaves blocking sunlight; the second on the roadside trees changing color together.

2. Common pitfalls and similar expressions

• Leaves of street trees and the trees' own change
  • The grammatical subject of 街路樹の葉が is 葉, but in 街路樹が the headword itself is the subject. Do not collapse the whole and its part.