This document provides information on four different chestnut species: Sweet Chestnut, Chinese water chestnut, Water chestnut, and Horse chestnut. It lists their scientific names, families, origins, and edible portions. The Sweet Chestnut is native to temperate regions and has edible nuts, fruit, and leaves. Chinese water chestnut is an aquatic vegetable that grows in Asia. Water chestnut is found in warm temperate Eurasia and Africa and has edible fruit. Horse chestnut seeds are listed as edible but its fruit is noted as toxic.