木の葉|このはkonoha[1]atamadaka (head-high)

1. expression, nounleaf (of a tree); tree leaves; foliage
   秋あきには木の葉このはが落おちる。↗

   Leaves fall in the autumn.

• Synonym葉っぱはっぱCasualColloquial and by far the most common word for leaves; covers any plant, including grass, not just trees. Slang for marijuana.
• Related樹葉じゅようWrittenWritten, botanical word for tree leaves; rare in everyday use. 「木の葉」 has a literary flavor and can also mean fallen leaves.

For tree leaves or fallen leaves use 「木の葉」; it works in both speech and writing and has a literary touch, as in 「木の葉が舞う」. In casual talk say 「葉っぱ」; 「樹葉」 is rare.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 樹木じゅもくの葉は。
2. 枯れ葉かれは。