No key was found for the requested taxon, but its parent (Castanea) is keyed as shown below.

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Key to Fagaceae

Fagaceae

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(c) Bradley, Keith
1 Fruits partially enclosed in a scaly cup; leaves lobed, toothed, crenate, or entire
(c) Bradley, Keith
1 Fruits enclosed in a spiny or prickly bur; leaves toothed.
(c) Irick, Zach - CC-BY-NC, permission granted to NCBG
(c) Kalininsky, Timur - CC-BY-NC, permission granted to NCBG
(c) Bradley, Keith
  2 Nuts rounded or flattened on one or two sides; bur with long, straight spines; winter buds < 1 cm long; leaves elliptic or oblanceolate, some of them usually > 12 cm long
(c) Danielson, Erik
(c) Bradley, Keith
  2 Nuts sharply triangular; bur with short, recurved prickles; winter buds 1.5-2.5 cm long; leaves ovate, 6-12 cm long