Dipterocarpus grandiflorus (Blanco) Blanco, Fl. Filip. ed. 2 (1845)
Latin for 'Large flowers'.

Synonyms
Dipterocarpus blancoi Bl., Dipterocarpus griffithii Miq., Dipterocarpus motleyanus Hook.f., Dipterocarpus pterygocalyx Scheff., Mocanera grandiflora Blanco, Vatica trigyna Griff.

Description
Upper canopy tree up to 49 m tall and 67 cm dbh. Stem with resin. Stipules up to ca. 180 mm long. Leaves alternate, simple, penni-veined, glabrous, lamina only slightly folded between secondary veins. Flowers ca. 94 mm in diameter, yellow-pinkish, placed in unbranched inflorescences. Fruits ca. 50 mm long, green-red, with two ca. 140 mm long wings placed on top of the nut, wind dispersed.

Ecology
In undisturbed but also often in disturbed mixed dipterocarp forests up to 100 m altitude. Quite often near coastal regions on hillsides and ridges with poor sandy, or ultrabasic soils.

Uses
Timber is commercially harvested. Oil is collected from seeds.

Distribution
Andaman Islands, Thailand, Peninsular Malaysia, Sumatra, Borneo (Sabah, East-Kalimantan), Philippines.

Local names in Borneo
Kalohing, Kangkawang, Kawang, Keruing, Keruing belimbing, Keruing kulup, Keruing simpore, Tempudan, Tempudan tunden.