Anisoptera marginata Korth., Kruidk. (1841)
Latin for 'margin', referring to the leaf margin.

Synonyms
Anisoptera grandiflora Brandis, Anisoptera mindanensis (non Foxw.) Wyatt-Smith

Description
Emergent tree up to 51 m tall and 121 cm dbh. Twigs smooth. Stipules ca. 8 mm long. Leaves alternate, simple, penni-veined. Flowers ca. 10 mm in diameter, white-yellowish, placed in panicles. Fruits ca.12 mm long, pale brown, 2-winged nut, wings ca. 120 mm long, wind dispersed.

Ecology
In undisturbed forests with poor soils up to 1000 m altitude. Mostly in alluvial sites (peat swamp, freshwater swamp), but occasionally on ridges in mixed dipterocarp or keranga forest. On rocky to sandy soils, including ultrabasic. In secondary forests usually present as a pre-disturbance remnant tree.

Uses
The wood is harvested for export purposes.

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

Local names in Borneo
Damar kunjit, Damar resak, Katimpun, Kayu tahan, Mersawa, Mersawa paya, Pangiran kerangas, Pengiran, Penjau abo, Pengiran kasat, Penyiau karabak, Resak gunung, Tuham.