Prunus arborea (Blume) Kalkman, Blumea 13 (1965)

Synonyms
Digaster sumatranus Miq.
Polydontia arborea Blume
Pygeum arboreum (Blume) Blume
Pygeum blumei Teijsm. & Binn.
Pygeum parviflorum Teijsm. & Binn.
Pygeum parviflorum var. densum King
Pygeum parviflorum var. robustum Koord. & Valet.
Pygeum robustum (Koord. & Valet.) Koehne
Pygeum stipulaceum King
Pygeum sumatranum (Miq.) Miq.

Description
Mid-canopy tree up to 40 m tall and 74 cm dbh. Stipules ca. 5 mm long, dropped early. Leaves very variable, alternate, simple, penni-veined, venation from barely visible to very pronounced, glabrous to densely hairy below, lower surface sometimes with nectary glands near petiole insertion. Flowers ca. 8 mm diameter, white-yellow-pinkish, placed in clustered racemes. Fruits ca. 9 mm diameter, green-red-black, 2-lobed drupes.

Ecology
In undisturbed mixed dipterocarp, keranga, sub-montane and montane forests up to 3000 m altitude. Usually on hillsides and ridges, but also along rivers and streams. On sandy soils. In secondary forests usually present as a pre-disturbance remnant.

Uses
The wood is locally used for house construction. The bark is used to make rice containers.

Distribution
Continental and tropical Asia. In Borneo collected throughout the island.

Local names
Borneo: Akil, Enkalamos, Jenteli, Kalana, Rotang bari, Vongking-vongking.