Nauclea officinalis (Pierre ex Pitard) Merr. & Chun., Sunyatsenia 5 (1940)
Latin for 'pharmaceutical', referring to medicinal properties.

Synonyms
Nauclea brunnea Craib, Sarcocephalus officinalis Pierre ex Pitard

Description
Mid-canopy tree up to 33 m tall and 67 cm dbh. Stipules ca. 10 mm long, rounded tip. Leaves opposite, simple, penni-veined, glabrous. Flowers ca. 3 mm diameter, yellowish, with corolla tube, flowers placed in globose flower heads. Fruits ca. 16 mm diameter, green-yellow-brownish, fused into fruiting body.

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

Uses
The wood is used for general construction, carving and furniture.

Distribution
Southern China, Indo-China, Thailand, Peninsular Malaysia, Sumatra, Borneo (Sarawak, Sabah, Central- and East-Kalimantan).

Local names in Borneo
Babangka, Bangkal, Bangkal darat, Bengkal, Garam pajau, Kambalu, Katung.