Pellacalyx lobbii (Hook.f.) Schimp., in E. & P. Pfl. Fam. 3, 7 (1893)

Named after T. Lobb [?-1894], a British plant collector.

Plaesiantha lobbii Hook.f.

Upper canopy tree up to 48 m tall and 85 cm dbh, twigs hollow. Stipules ca. 5 mm long, dropped early. Leaves opposite, simple, penni-veined, glabrous, margin slightly toothed. Flowers ca. 5 mm diameter, white, placed in axillary bundles. Fruits ca. 12 mm long, green-red, berries.

Tree up to 35(-48) m by 40(-85) cm, sometimes with buttresses 1.5-5 m high. Bark grey to brown, regularly polygonally fissured. Leaves obovate, obovate-oblong, 7-11(-15) by 3.5-5 cm, entire to remotely serrulate, glabrous, sometimes lepidote above, rarely puberulous on the midrib and nerves on both surfaces, abruptly acute, base cuneate; nerves 5-7 pairs, slightly elevated beneath, plane above; petiole 6 mm. Stipules 3-5(-7) mm long. Calyx (incl. ovary) narrow, 6.5-8 by 2-3 mm, glabrous or sparingly pubescent with minute, stellate hairs without, green, (3-)4(-5)-lobed, lobes deltoid, 1.5-2 mm long, acuminate. Petals white, slightly obovate, 1.5-2 mm long, slightly dentate in the upper half. Ovary 9-celled, style 3 mm long, slightly pilose. Fruit green, subglobose, c. 8 mm diam., calyx lobes erect, very rarely reflexed. Seeds ellipsoid, 1-2 by 1 mm. [from Flora Malesiana]

In undisturbed to disturbed (open) mixed dipterocarp forests up to 300 m altitude. On hillsides and ridges with sandy soils, but also on clay and limestone.

Wood fairly heavy, yellowish-brown, occasionally used for rafters and fuel.

Sumatra, Borneo.

Local names
Borneo: Banglai, Baniran, Mata undan, Paserujan gunung, Rasu.
Malaysia: Bulu-bulu, bebulu, membulu rimba, pianggu jantan, johor, lemak ketam.
Sumatra: Bulu rebung, Kayu bulu.