Durio grandiflorus (Masters) Kosterm. & Soegeng

A medium-sized tree up to 30 m tall, with bole up to 50 cm in diameter, buttresses low and rounded, bark surface initially smooth and hoop-marked, becoming longitudinally cracked and flaky, and mauve-brown. Leaves oblong to obovate, 9-24 cm x 3.5-8.5 cm, densely pale golden-brown scaly below. Flowers solitary or 2 together, almost sessile in axils of fallen leaves or on older branches, petals up to 25 mm long, white, stamens partly in bundles, partly free, opening by a pore. Fruit an ellipsoid capsule, up to 20 cm x 15 cm, outside with pyramidal, with stiff spines up to 2 cm long. Seeds brown, ellipsoidal, 3 cm long, each covered by yellow aril. D. grandiflorus resembles D. excelsus, but differs in the scaly lower leaf surface, the presence of a calyx tube, the stellately haired petals and the stamens partly arranged in bundles.

It is locally common on clay-rich soils.

It is locally common (especially in Sabah) in lowland mixed dipterocarp forest on clay-rich soils.

Northern Borneo (Sarawak, Brunei, Sabah); occasionally also cultivated for the fruits (e.g. in Brunei).

Food: The aril around the seed is edible. Timber: The wood is reputed to be used as durian.