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Woodroof J 1979 pp 662-663 [KTMP, TEXT, FER]
Roecklein J 1987 pp 327 [USE]
Heartnut have been known to survive -50°C.
Perennial deciduous tree. In the United States the lifespand of the tree is about 30 years.
Heartnut, Japanese walnut, Cordate walnut, Siebold walnut.
Scientific synonym: J. ailantifolia. The heartnut is a native of Japan. Heartnuts environmental requirements are similar to those of black walnut and the Carpathian type of english walnut.