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"National Agricultural Library. Originally from US Forest Service. United States, DC, Washington."   cc-by-nc-sa-3.0

Juglans nigra (Black Walnut) is a species of tree in the family Juglandaceae. It has a self-supporting growth form. It is native to the contiguous United States, Canada, United States, North America, and eastern north america. Black Walnut has compound, broad leaves and yellow flowers. It is a photoautotroph.

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EOL has data for 88 attributes, including:

Known occurrences, collected specimens and observations of black walnut. View this species on GBIF
"National Agricultural Library. Originally from US Forest Service. United States, DC, Washington."   cc-by-nc-sa-3.0