Castanopsis hypophoenicea is a tree in the family Fagaceae.

The specific epithet hypophoenicea means 'crimson beneath', referring to the indumentum on the leaf underside.

[2] Castanopsis hypophoenicea grows as a tree up to 30 metres (100 ft) tall with a trunk diameter of up to 60 cm (24 in).

Its ovoid or ellipsoid nuts measure up to 6 cm (2.4 in) long.

[1][2] Its habitat is dipterocarp forests up to 800 m (2,600 ft) elevation.