Madhuca pubicalyx is a tree in the Sapotaceae family. It grows up to 25 metres (80 ft) tall, with a trunk diameter of up to 30 centimetres (12 in). The bark is greyish brown. Inflorescences bear up to eight flowers. The fruits are ellipsoid, up to 2.6 centimetres (1 in) long. The specific epithet pubicalyx is from the Latin meaning "soft-haired calyx". Habitat is lowland mixed dipterocarp forest from sea-level to 50 metres (160 ft) altitude. M. pubicalyx is endemic to Borneo.