Macaranga trachyphylla Airy Shaw

Small trees up to ca. 18 m tall and 15 cm dbh, reproductive from 3 m tall and 2 cm dbh. Twigs hollow, ant inhabited, densely hairy (short simple hairs), sandpaper-like to the touch, ant openings small (ca. 1 mm diameter). Stipules broadly ovate, semi-persistent, recurved, (almost) completely surrounding the twigs, 6-10 mm long by 7-14 mm wide. Petioles densely hairy, feeling sandpaper-like, up to ca. 41 cm long. Leaves alternate, peltate, 3-lobed, 23-42 cm long by 22-40 cm wide, length/width-ratio 0.98-1.43; secondary veins 10-15, ending in the margin; central lobes 7.5-21 cm long by 11-15 cm wide, lateral lobes 4-13 cm long; leaf base broadly rounded, peltate margin length 3.5-7.2 cm; leaf margin with glands; leaf upper surface hairy, feeling sandpaper-like; leaf lower surface hairy, feeling sandpaper-like, numerously gland dotted. Staminate inflorescences branched; flowers clustered per bracteole; bracteoles with fimbriate margin. Pistillate inflorescences branched; fruits 9-11 mm wide, (4-)5-locular, one glandular patch on each carpel wall, developing into horn-like appendages.

Ecology: Collected up to ca. 800 m altitude. An early successional species found in disturbed sites in primary forest and in secondary forests.

Distribution: Endemic for Borneo, where it has been collected in Sarawak, Sabah, Brunei and West-Kalimantan.