Horsfieldia laticostata (J.Sinclair) W.J.deWilde, Gard. Bull. Sing. 39 (1986)
Latin for 'broad veins'.

Synonyms
Horsfieldia brachiata var. laticostata J.Sinclair

Description
Upper canopy tree up to 42 m tall and 56 cm dbh. Stem with red sap. Stipules absent. Leaves alternate, simple, penni-veined, glabrous. Flowers ca. 2 mm diameter, yellow-orange, placed in panicles. Fruits ca. 33 mm diameter, yellow-orange-red, glabrous, dehiscent capsules. Seeds with undivided orange aril.

Ecology
In undisturbed keranga, peat-swamp and dipterocarp forests up to 800 m altitude. Usually on swampy, alluvial sites with poor clay to sandy soils, also on ultrabasic. In secondary forests usually present as a pre-disturbance remnant.

Distribution
Borneo (Sarawak, Sabah, Central- and East-Kalimantan).

Local names in Borneo
Darah-darah, Kumpang, Piasau piasau.