Payena lamii is a tree in the family Sapotaceae. It grows up to 15 metres (50 ft) tall with a trunk diameter of up to 20 centimetres (10 in). Inflorescences bear up to 10 flowers. The fruits are ellipsoid, up to 3 cm (1 in) long. The tree is named for the Dutch botanist Herman Johannes Lam. Its habitat is swamp and kerangas forests from sea-level to 250 metres (800 ft) altitude. P. lamii is endemic to Borneo and known only from Sarawak.