I can see Allegheny chinquapin Castanea pumila

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If your specimen has leaves with:	and has nuts with:	then you have:

larger than below (14-15-20-25 cm) (5½-6-8-10 in), with very long and distinct ▲▲ teeth	flattened on one side, and twice the size as below	lookalike 🌰︎ American chestnut Castanea dentata.
smaller than above (7½-13-15-20 cm) (3-5-6-8 in), with ordinarily-long and distinct ▲▲ teeth	not flattened on one side, and half the size as above	this plant, please continue below …

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Also called American chinquapin, Ozark chinquapin, dwarf chestnut, and Castanea ozarkensis. Also spelled chinkapin. The word chinquapin comes from the nut chechinquamin, in Eastern Algonquian, specifically Virginia Algonquian or Powhatan.

Part of 🌰︎ chestnut / chinkapin genus Castanea in beech / oak family Fagaceae in bayberry / beech / birch / oak / walnut order Fagales.

Native to southern and eastern 🇺🇸 USA, into the Midwest. 🌎︎ Map (North America, Central America).

Formerly abundant, this tree is having a tough time with a bark fungal disease chestnut blight Cryphonectria parasitica.

Although not having as hard a time as this tree's closely-related (used to share most of its home range) sister-species 🌰︎ American chestnut Castanea dentata.

Uses by native peoples
(Ethnobotany database)

Castanea hosts caterpillars of 129 species
of butterflies and moths, in some areas.

Learn more about Allegheny chinquapin Castanea pumila

🔍︎ 🔍︎ images Discover Life Encyclopedia of Life Missouri Botanical Garden Flora of North America USDA PLANTS db USFS Wikipedia

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🏠︎ 🌰︎ American chestnut Castanea dentata