Japanese Chinquapin (Castanopsis cuspidata) — identification, habitat & look-alikes

Japanese chinquapin is an evergreen tree native to Japan. Its nuts are smaller and rounder than those of Itajii chinkapin (Castanopsis sieboldii), and leaves alone may not be enough to tell the trees apart. The small nuts have long been eaten in Japan.

Appearance

Appearance: Its nuts are smaller and rounder than those of the closely related Itajii chinkapin (Castanopsis sieboldii). Leaves alone may not settle the identification.
Growth form: An evergreen tree with a dense crown and slender branches.
Leaves: The firm leaves are dark green above and brownish underneath.
Fruit: Each spiny cup holds a small, nearly round nut.

Look-alikes

Itajii chinkapinCastanopsis sieboldii

Compare several mature nuts: Japanese chinquapin's are usually smaller and rounder. Its fruit cups have small bumps, but young nuts can mislead; include fruiting twigs in the photo.

Where it lives

Typical habitats: Warm evergreen woods in Japan
Botanical gardens in the U.S.
Range: Native to Japan. It is grown in a botanical garden in North Carolina.

Name and classification

Varieties and forms: A variegated garden form called 'Variegata' has leaves edged in creamy yellow.

Conservation

IUCN Red List: LCLeast ConcernLow risk of extinction

Culture and stories

Culture and stories: The small nuts have long been used as food in Japan, and the wood has been used for shiitake mushroom logs.

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