200506 Black Walnut Tree (Juglans nigra) - USDA Illustration
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USDA-NRCS PLANTS Database / Britton and A. Brown. 1913. Illustrated flora of
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USDA, NRCS. 2024. The PLANTS Database (http://plants.usda.gov). National Plant Data Team, Greensboro, NC 27401-4901 USA.