Juglans cinerea
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Juglans cinerea, commonly known as butternut or white walnut, is a species of walnut native to the eastern United States and southeast Canada.
A butternut
Fossilized Juglans cinerea (fossil white walnut) in Pleistocene glacial sediments, Michigan
Butternuts killed by butternut canker
Juglans ailantifolia
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Juglans ailantifolia, the Japanese walnut, is a species of walnut native to Japan and Sakhalin.
Heartnut in flower
Herbarium sheet, 19th century
Juglans ailantifolia bark at the Cornell Botanic Gardens