How many kinds of walnuts are there?

Walnut is a dicotyledonous plant of angiosperms in Juglandaceae. China Walnut (1992) records that there are 3 groups of 8 species of Juglans plants in China, namely

Walnut group: Walnut.

Iron walnut

Juglans mandshurica group: Juglans mandshurica.

Hebei walnut

Wild walnut

Heart-shaped walnut )

Keppel walnut (ghost walnut) (J.sieboldiana Max. )

Black walnut group: black walnut

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