The Q&A Archives: Where would I find black walnut trees in Philadephia?

Question: Where would I find black walnut tree leaves in Philadephia? And what would they look like?

Answer: Black walnut (Juglans nigra) trees are deciduous, so they have no leaves in winter but you might contact the Morris Arboretum in Chestnut Hill ( for assistance in locating a black walnut tree so you can see some first hand in a few months. They might also have a (dried) specimen in their library. The telephone number is 215-247-5777. Here is a photograph of the foliage and a photograph of a mature tree to look at in the meantime.

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