In other words, the ancestors.
Subkingdom Tracheobionta ≈Vascular plants
Superdivision Spermatophyta ≈Seed plants
Division Magnoliophyta ≈Flowering plants
Class Magnoliopsida ≈Dicotyledons
Family Fagaceae ≈Beech family
Genus Castanea ≈chestnut
Species Castanea dentata ≈American chestnut
Fagaceae represents the oak, chestnut, beech, birch, hazel and ironwood, or otherwise known as the Beech Family. The closest related families to the beech family are the represented below, including commonly known names such as the Birch Family and Walnut Family of trees.
Castanea consists of several European and Asian chestnut species as well as three smaller North American chestnuts known as chinkapins, in addition to the American chestnut. The European chestnut is nearly identical, termed Castanea sativa. The most common seen species in cultivation of North America is the Chinese chestnut (C. mollissima), chiefly known for its nut crops. The three chinkapin species include C. ozarkensis, C. pumila and C. alnifolia. A representation of the showing the inherent relatedness of these species to Castanea dentata is shown below using Quercus, the oaks, as an outgroup for comparison.
Continue on to the Geographic locations of the chestnut tree...which are few and far between nowadays!
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