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Julian Sutton (2019)
Recommended citation
Sutton, J. (2019), 'Juglans × quadrangulata' from the website Trees and Shrubs Online (treesandshrubsonline.
J. cinerea × J. regia. A little-known hybrid, rarely seen outside North America. Young shoots downy; leaflets usually nine, resembling J. regia but slightly toothed, and pubescent beneath (Grimshaw 2004).