Lithocarpus bancanus (Scheff.) Rehd., J. Arn. Arb. 10 (1929)
Named after 'Bangka', an island between Sumatra and Borneo where the species occurs.
Lithocarpus rajah (Hance) A.Camus
Lithocarpus scyphigera var. riedelii (King) A.Camus
Pasania bancana (Scheff.) Markgr.
Pasania rajah (Hance) S.Moore
Quercus bancana Scheff.
Quercus rajah Hance
Quercus scyphighera var. riedelii King
Synaedrys bancana (Scheff.) Koidz.
Synaedrys rajah (Hance) Koidz.
Mid-canopy tree up to 38 m tall and 99 cm dbh. Stipules ca. 1 mm long.
Leaves alternate, simple, penni-veined, glabrous, venation inconspicuous.
Flowers ca. 3 mm diameter, green-grey, placed in racemes. Fruits ca. 14 mm long,
green, base of nut enclosed by cupule.
Tree up to 25(-38) m tall, 50(-99) cm diameter. Bark smooth or scaly, yellowish to greyish brown;
inner bark fibrous, pinkish. Sapwood yellowish. Twigs sparsely appressed tomentose,
late-glabrescent, smooth or sparsely lenticellate. Stipules deltoid, 0.5-1 x 0.5 mm. Leaves
thin-coriaceous, rarely coriaceous but not rigid, glabrous above, sparsely yellowish to
brownish appressed tomentose with simple hairs and sometimes mixed with a few stellate
hairs below; broadly elliptic, (9-)12-14(-17) x (4-)5-6(-7) cm, base cuneate to acute,
margin slightly revolute, apex acuminate, acumen 5-15 mm long; midrib thin, raised
on both surfaces, stronger and sparsely to densely appressed tomentose below; lateral
veins thin, (9-)10-12(-14) pairs, lax, flat on both surfaces or silghtly raised below, faintly
joining near the leaf margin, forming an angle of 40-60 degrees with the midrib; intercostal
venation subscalariform to subreticulate, dense, obscure on both surfaces; petiole
(8-)12-15 mm long. Inflorescences male, androgynous or mixed. Male inflorescences
5-20 cm long; bracts and bracteoles ovate, 0.5-1 x 0.5 mm. Male flowers solitary
along the rachis; perianth lobes acute, 4-6 x 2-3 mm; stamen filaments 2.5-3.5 mm
long; pistillode globose, c. 1 mm diameter. Androgynous or mixed inflorescences 10-
16 cm long; bracts and bracteoles ovate, 0.5-1 x 0.5 mm. Female flowers solitary along
the rachis; perianth lobes acute, 4-5 mm across; staminodes 12; styles conical, recurved,
1-1.5 mm long. Cupules solitary along the rachis, sessile, saucer-shaped, 0.5-0.7 x 1.5-
2 cm, densely appressed tomentose, lamellate; wall woody, thin, enclosing less than half
of the acorn; lamellae distinct, edge denticulate, set in 5-6 regular lines. Acorns depressed
ovoid to subglobose, 1.5-2 cm across, most part exserted, glabrous, brownish; base rounded,
apex rounded and abruptly acute, scar deeply concave, c. 1 cm diameter; wall woody,
thin, most part free from the cupule. [from Tree Flora of Sabah and Sarawak]
In undisturbed mixed dipterocarp forests up to 900 m altitude. Mostly on
hillsides and ridges with sandy to clay soils, but also found in peat swamp forest.
Peninsular Malaysia, Sumatra, Borneo.
Borneo: Mempening, Pampaning.