- A chestnut <em>(Castanea pumila)</em> of eastern North America that grows as a shrub or small tree.
- Any of several evergreen trees or shrubs of the family Fagaceae, including species in the genera <em>Chrysolepis</em> of western North America and <em>Castanopsis</em> of East and Southeast Asia.
- The edible nut of any of these plants.
- See <internalXref urlencoded="chinkapin">chinkapin</internalXref>.
- A branching, nut-bearing tree or shrub (<spn>Castanea pumila</spn>) of North America, from six to twenty feet high, allied to the chestnut. Also, its small, sweet, edible nat.
- a small shrubby oak (<spn>Quercus prinoides</spn>) of the Atlantic States, with edible acorns.
- an evergreen shrub or tree (<spn>Castanopes chrysophylla</spn>) of the Pacific coast. In California it is a shrub; in Oregon a tree 30 to 125 feet high.
- any of the shrubs in the genus Castanopsis
- any of the several trees and shrubs in the genus Chrysolepis
- some of the species in the <xref>chestnut</xref> genus <xref>Castanea</xref>
- chinkapin oak (Quercus muhlenbergii), a species of oak whose leaves resemble those of chinkapins
- water-chinquapin, the water plant Nelumbo lutea, American lotus
- the redear sunfish (Lepomis microlophus)
- small nut of either of two small chestnut trees of the southern United States; resembles a hazelnut
- shrubby chestnut tree of southeastern United States having small edible nuts
- shrubby tree closely related to the Allegheny chinkapin but with larger leaves; southern midwestern United States