American - Chinese - Japanese - European
American Chestnuts:
Nuts are relatively small, 1/2 to 1 inch in diameter
Tips of American chestnuts are pointed
Nuts are hairy over 1/3 to 2/3 of length from pointed end
Vascular bundles in a small star pattern on hilum end
2 to 3 nuts in each bur
European Chestnuts:
Nuts are relatively large, 1 to 2 inches in diameter
Tips of European chestnuts are pointed
Surface hair only at tip
Vascular bundles in a large star pattern on hilum end
2 to 3 nuts in each bur

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