What is the another word for the leaves of tree?

deciduous

add. NO. In Gondwanaland, there are many broad leaved trees, and very few are deciduous. In New Zealand, there are only a couple of (native) trees that are deciduous, and most are not conifers.

And, even in the N Hemisphere there are conifers that are deciduous.

Perhaps the distinction you seek is net-veined leaves?