Aglaia forbesii

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Aglaia forbesii


Tree up to 35 m, with a dense rounded crown. Outer bark often smooth, brown, pale brown, greenish-brown or greyish-brown, with vertical cracks and lenticels in longitudinal rows, sometimes flaking in irregular scales; inner bark brown, yellowish-brown or reddish-brown; sapwood orange-brown, pale brown, pale yellowish-brown or sometimes reddish-brown; latex white. Leaves imparipinnate, up to 100 cm long and 60 cm wide, ellip- tical in outline, petiole up to 35 cm, petiole, rachis and petiolules with indumentum like the twigs. Inflorescence up to 35 cm long and 25 cm wide; peduncle up to 6 cm, peduncle, rachis, branches and petiolules with numerous to densely covered with white, pale brown or reddish-brown stellate scales or hairs. Flowers up to 2 mm long; pedicels up to 1.5 mm. Petals 5 or 6. Staminal tube shorter than the corolla, up to 1.5 mm long, cup-shaped or subglobose, slightly incurved and shallowly 5–lobed at the apical margin with the aperture up to 1.3 mm wide or with a pin-prick apical pore; anthers 5, 1/3 to nearly the length of the tube, obovoid and just protruding through the apertuife. Fruits up to 4 cm long and 3.8 cm wide, ellipsoid or subglobose, sometimes with a small beak at the apex and sometimes narrowed at the base to a short stipe 3 mm long, sometimes with a longitudinal ridge encircling the fruit; pericarp up to 4 mm thick, soft, fibrous and flexible, white, yellow, orange, grey or greenish-grey, longitudinally wrinkled when dry, densely cov- ered with white or yellowish-grey stellate scales or peltate scales which have a fimbriate margin on the outside, pericarp shiny inside, with white latex. Seed 1.5–3 cm long, 2–2.2 cm wide, c. 1.5 cm thick, with a complete translucent, gelatinous, yellow or pink aril up to 3 mm thick; the aril sweet-sour or with a flavour like that of Lansium domesticum Correa.


Asia-Tropical: Borneo present; Malaya (Peninsular Malaysia present); Sumatera (Sumatera present), S Burma present, S Thailand present
S Burma, S Thailand; Malesia: Sumatra, Peninsular Malaysia, Borneo.


The leaflets of Aglaia forbesii are sometimes coriaceous, the midrib is prominent and lateral veins are often black or red when dry. The tiny stellate scales scattered on the lower surface are inconspicuous, but stellate hairs are sometimes also present on immature leaves. It is sometimes difficult to separate the leaves from those of A. leptantha, but the leaflets of that species are thinner and the secondary venation is visible, all the veins are black (or sometimes red in Borneo) when dry; the leaf apex is obtuse and parallel-sided. Aglaia leptantha usually has peltate scales, with a fimbriate margin and a dark central spot.


Ridley 1922 – In: Fl. Malay Penins. p 407
Pannell 1989 – In: Tree Fl. Malaya. 218.
Ridley 1922 – In: Fl. Malay Penins. p 406
Pannell 1992: p. 207. – In: Kew Bull., Add. Ser. f. 55.
Pannell 1989 – In: Tree Fl. Malaya. p 215