a black walnut. Interaction with horses Horses are susceptible to laminitis from exposure to black walnut wood in bedding. Largest trees The US national champion black walnut is on a residential property on Sauvie Island, Oregon. It is diameter at breast height and tall, with a crown spread of . The tallest black walnut in Europe is located in the Woluwe Park in the city of Sint-Pieters-Woluwe, Brussels, Belgium. It has a circumference of , height of exactly (measured by laser), and was planted around 1850 (± 10 years). The largest black walnut in Europe is located in the Castle Park in the city of Sereď, Slovakia. It has a circumference of , height of and estimated age of 300 years. See also English walnut, Persian walnut Taxonomy of walnut tree varieties Anthelmintic References Further reading Petrides, G. A. and Wehr, J. (1998). Eastern Trees. Houghton Mifflin Company. Little, Elbert L. (1980) National Audubon Society Field Guide to North American Trees: Eastern Edition. Borzoi Books. External links A variety index and characteristics guide is available from Missouri Extension. Guide to "Growing Black Walnuts for Nut Production" University of Missouri Center for Agroforestry Walnut Council.org homepage Flora of North America: Juglans nigra—Range distribution Map: Bioimages.vanderbilt.edu: Juglans nigra images Set of Black Walnut ID photos and range map Harvesting Black Walnuts Home Production of Black Walnut Nutmeats Growing Black Walnut Black Walnut crackers Black Walnut Diagnostic photos: tree, leaves, bark and fruit The Hiker's Notebook Black Walnut Toxicity study Juglans nigra - information, genetic conservation units and related resources. European Forest Genetic Resources Programme (EUFORGEN) nigra Edible nuts and seeds Trees of Eastern Canada Trees of the Eastern United States Trees of the Great Lakes region (North America) Trees of the Northeastern United States Trees of the North-Central United States Trees of the Plains-Midwest (United States) Trees of the Southeastern United States Walnut, Black Flora of the Appalachian Mountains Symbols of Missouri Trees of humid continental climate Plants described in 1753 Taxa named by Carl Linnaeus Plant dyes Garden plants of North America Ornamental trees Flora of Texas Trees of the Southern United States Trees of North America Trees of the United States Trees of Canada Trees of the South-Central United States