Pterocymbium tubulatum (Masters) Pierre, Fl. Forest. Cochinch. 13 (1889)

Latin for 'tube-shaped'.

Pterocymbium parviflorum Merr.
Sterculia tubulata Masters

Emergent tree up to 58 m tall and 77 cm dbh. Stipules ca. 2 mm long. Leaves crowded at twig tips, alternate, simple, tripli-veined, base sometimes cordate, lower surface glabrous to densely hairy. Flowers ca. 8 mm diameter, green?, placed in panicles. Fruits ca. 105 mm long, green, winged nuts (nuts ca. 14 mm long).

In undisturbed mixed dipterocarp to sub-montane forests up to 1000 m altitude. Throughout the forest, from alluvial sites to hillsides and ridges. On sandy soils and on limestone. In secondary forests usually present as a pre-disturbance remnant.

Peninsular Malaysia, Sumatra, Borneo (Sarawak, Sabah, West- and East-Kalimantan).

Local names
Borneo: Bilungkaan, Bayur menamang, Kalinmanok, Kayu ketimun.