Mastixia trichotoma var. maingayi (C.B.Clarke) Danser

Branchlets very stout, yellowish, woolly. Leaves ovate to elliptic, 9-20 by 4-11 cm, thick coriaceous, tough and stiff; base obtuse to truncate; apex acute to acuminate; nerves 5-6 pairs, deeply impressed above, very prominent below, often arcuate, numerous parallel intermediary veins conspicuous; petiole 1½-2½ cm, stout, villous to woolly. Inflorescence up to 15 cm, compact, branched 4(-5) times, velutinous to golden woolly; basal bracts up to 1 cm, persistent. Sepals 4. Petals 4. Stamens 4. Fruit ovoid, 2½-3½ by l½-2cm; persistent disk inconspicuous, sepals prominent.

In primary forests with Dipterocarps; also in secondary or marsh forests, from the lowland to 1400 m. Fl. Febr.-Aug. (Now.); fr. April-Dec. Galls occur on leaves and fruit.