Castanea ozarkensis Ashe. Ozark Chinquapin. Phen: May-Jul; Sep-Oct. Hab: Dry to dry-mesic upland woodlands and forests, bluffs, glade margins, usually in acid soils derived from sandstone or chert. Dist: S. MO, e. OK, and w. AR; disjunct in c. AL, where now apparently extirpated by blight.

Origin/Endemic status: Endemic

Taxonomy Comments: C. ozarkensis is related to C. pumila, though showing some relation as well to C. dentata. C. ozarkensis is more susceptible to blight than C. pumila.

Synonymy: = F, G, S; = Castanea pumila (L.) Mill. var. ozarkensis (Ashe) G.E.Tucker – Ar, K1, Johnson (1988); = n/a – C; < Castanea ozarkensis Ashe – FNA3, K3, K4

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