A leaf is used to identify a tree as an ash. What are the characteristics of the leaf? Find “ash” on the key on the right and work backward to find the characteristics. needlelike, compound, attached at many points, leaf bases opposite each other broad leaf, simple leaf, attached at many points, leaf bases attached opposite each other broad leaf, compound leaf, leaves attached at many points, leaf bases attached opposite each other on branch. 1a. Needlelike leaf → Step 10 1b. Broad leaf → Step 2 2a. Compound leaf → Step 3 2b. Simple leaf → Step 7 3a. Leaves attached at single points → Buckeye 3b. Leaves attached at many points → Step 4 4a. Leaf bases attached opposite each other on branch → Ash 4b. Leaf bases attached staggered on branch → Step 5