Irvingia malayana Oliv. ex Benn., in Hook.f., Fl. Br. Ind. 1 (1875)

Latin for 'from Malaya', i.e. Peninsular Malaysia.

Synonyms
Irvingella harmandiana van Tiegh., Irvingella malayana (Oliv. ex Benn.) van Tiegh., Irvingella oliveri (Pierre) van Tiegh., Irvingia harmandiana (van Tiegh.) Pierre, Irvingia longipedicellata Gagnep., Irvingia oliveri Pierre

Description
Emergent tree up to 59 m tall and 117 cm dbh. Stipules up to 30 mm long, dropped early. Leaves alternate, simple, penni-veined, glabrous, often with cordate leaf base. Flowers ca. 6 mm diameter, white-yellow, placed in panicles. Fruits ca. 46 mm long, green-yellow, drupes.

Ecology
In undisturbed mixed dipterocarp forests up to 600 m altitude. Usually on hillsides and ridges with clay to sandy soils. In secondary forests usually present as a pre-disturbance remnant.

Uses
The wood is used for heavy construction, knife handles and furniture. The seeds are edible and also used to extract fat for soap, wax and candles.

Distribution
Indo-China, Thailand, Peninsular Malaysia, Sumatra, Borneo (throughout the island).

Local names in Borneo
Asem pau, Batu, Euselu, Kayu batu, Kayu tulang, Kayu tulung, Kerangi, Melenna gunung, Patok entilit, Pau kijang, Tengilan.