Simple – Leaf blade is one continuous unit (cherry, maple, and elm)
Compound – Several leaflets arise from the same petiole
Pinnately compound – Leaflets arranged on both sides of a common rachis (leaf stalk), like a feather (mountain ash)
Palmately compound – Leaflets radiate from one central point (Ohio buckeye and horse chestnut)
Double pinnately compound – Double set of compound leaflets