- a shrubby chestnut, Castanea pumila, of the beech family, native to the southeastern U.S., having toothed, oblong leaves and small edible nuts.
- a Pacific coast evergreen tree, Castanopsis chrysophylla, of the beech family, having deeply furrowed bark, dark green lance-shaped leaves, and inedible nuts.
- the nut of either of these trees.
"A long branch of spiky chinquapin reached out from nowhere to snag the nylon shell of my parka, and when I stopped to free my sleeve from the yellow bush, I was surprised to spot the girl in the green flip-flops moving slyly through the distant trees."
- Lori Lansens, The Mountain Story