How do I identify what the scientific and common name for this shrub/tree is based on the leaf I found?

Question

How do I identify what the scientific and common name for this shrub/tree is based on the leaf I found?

Answer 1

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Answer 2

Look in books.

Answer 3

Plants are named according to the Linnaen system which uses flower structure to categorise and provide the scientific name.You may be able to identify the genus from a leaf, if it is sufficiently distinctive, but you need a flower to be certain of the species. Botanical gardens in the area are the best source of information.