Author: Maingay ex Bentham
Morphological description (Koompassia grandifl compl FM38 )
Trees , deciduous.
Leaves distichously or spirally arranged, imparipinnate. Stipules free, very small and caducous. Leaflets 5-12(-17) per leaf, alternate, petiolulate; midrib furrowed above, prominent below; lateral nerves usually many, very slender, often obscure and hardly distinguishable especially on the upper surface; veins loosely finely reticulate, often obsure or indistinct.
Inflorescences axillary or terminal, paniculate; bracts and bracteoles minute, inconspicuous, usually caducous; pedicels very short or absent. Hypanthium absent. Calyx 5-lobed, lobes regular, imbricate, puberulous to thinly pubescent. Petals 5, more or less equal in shape and size. Disk absent. Stamens 5, free, more or less equal in length; filaments very short, glabrous; anthers basifix, opening with apical and basical pores, both pores connected by a thin (nearly) dehiscent rim and sometimes appearing to be longitudinally dehiscent. Ovary sessile or subsessile, 1-ovuled; style and stigma rather short and small.
Pods laterally strongly compressed, twisted 180 or not at the base, indehiscent or slightly dehiscent only when germinating, surrounded by a broad, papery wing, the centre thickened and veined.
Seeds strongly laterally compressed, exalbuminous.
Distribution
A small genus of 3 species in Malesia : Sumatra, Malay Peninsula, Borneo, Philippines and New Guinea.
Uses
The timber is suitable for structural usage, when treated with wood preservatives also outdoors. See Wan Razali & Sudo (1993: 270-275).