Aglaia korthalsii Miq., Ann. Mus. Bot. Lugd. Bat. 4 (1868)

Named after P.W. Korthals [1807-1892], a Dutch botanist.

Aglaia aquatica (Pierre) Harms
Aglaia cauliflora Koord.
Aglaia celebica Koord.
Aglaia confertiflora Merr.
Aglaia dysoxylifolia Koord.
Aglaia dysoxylonoides Koord.
Aglaia longipetiolulata Baker.f.
Hearnia aquatica Pierre
Hearnia sarawakana C.DC. in DC.

Tree up to 34 m. Bole up to 16 m; up to 76 cm in diam.; with triangular buttresses outwards up to 1.5 m with exposed roots beyond, upwards up to 2 m. bole fluted above. Bark pale to dark reddish-brown or pinkish-brown or orange brown, sometimes with coarse longitudinal fissures or rows of lenlicels, flaking in large irregular roundish scales, exposing orange or yellowish-green bark beneath; inner bark pink, dark greenish- pink or purplish-pink, fibrous; sapwood pale pink, pale yellow, yellow or white; latex white. Twigs with numerous to densely covered with shiny reddish-brown peltate scales which have a dark centre, becoming paler towards the margin or which arc pale throughout, the margin irregular or shortly fimbriate, latex white. Leaves up to 40 cm long and 48 cm wide, obovale in outline; pefiole 7-12 cm. petiole, rachis and petiolules with numerous scales like those on the twigs. Leaflets (3-)5(-7), 8-27(-36) by (2.5-) 3-8 cm, apex acuminate, usually rounded but sometimes cuneate at the asymmetrical base; with scales like those on the twigs few on the upper surface and scattered or numerous on the lower surface at fairly regular intervals, sometimes with faint reddishbrown pits; veins 10-25 on each side of the midrib; petiolules usually 5-10(-30) mm. Inflorescences borne in leaf axils or on old wood of the twigs. Male inflorescence up to 30 cm long and wide; peduncle 0.5-2 cm, peduncle, rachis and branches with numerous to densely covered with scales like those on the twigs. Female inflorescence like the male but often much smaller, with fewer branches and flowers. Flower c. 1.5-2 mm long and 1.6-2.5 mm wide; pedicel 0.8-3 mm; calyx with few to numerous peltate scales like those on the twigs, divided almost to the base into 5 rounded lobes which have fimbriate margins. Petals 5. Staminal tube 0.8 mm long, 1.9 mm wide, obovoid or cup-shaped with the apical margin incurved and shallowly 5-Iobed; anthers 5, c. 0.4 mm long, ovoid, inserted inside the rim of the tube, protruding and pointing towards the centre of the flower. Infructescence up to 17 cm long and 14 cm wide, with up to 15 fruits; peduncle 1-2 cm, the peduncle, rachis and branches with numerous scales like those on the twigs. Fruits 2-4 cm long, l-3.5(-5) cm wide, ellipsoid or subglobose, orange, densely covered with orange-brown peltate scales which have a fimbriate margin on the outside and with small longitudinal wrinkles, the pericarp indehiscent with a dehiscence line running longitudinally around the fruit along which the ripe fruit breaks open when pressure is applied, the pericarp 1-10 mm thick, fibrous and flexible, with some white latex, the inner surface, without hairs or scales, shiny orange; fruitstalks 1-2 cm. Locules 2 (or 3), each containing or 1 seed, septum persistent, up to 0.5 mm thick, membraneous. Seeds 1.5-2 cm long, 1-1.5 cm wide, 0.8 mm through, ellipsoid, with inner surfaces flattened; aril c. 2 mm thick, translucent yellow or pale orange, juicy or gelatinous, edible, sweet or rather bitter tasting, firmly attached to the testa especially at the hilum and main antiraphe vascular bundle, usually not quite complete on the antiraphe side, the seed coal with branched venation. [from Flora Malesiana]

Found in primary, including riverine and peat swamp, forest, secondary forest, along rivers and in villages; on clay, loam, limestone, sandstone, sand. Cultivated in Kelantan (NE Malay Peninsula); occurring up to 1700 m altitude.

The wood is locally used for house poles. The fruits are edible.

From India, Buthan, Indo-China, Burma and Thailand to the Moluccas.

Local names
Borneo: Bilajang merah, Bunjau, Langsat, Langsat munyit, Lantupak, Mula, Mulak, Pulu, Segara.