Lithocarpus blumeanus (Korth.) Rehd., J. Arn. Arb. 10 (1929)
Named after C.L. Blume [1796-1862], a Dutch botanist.
Castanopsis blumeana (Korth.) Rehd.
Cyclobalanus blumeana (Korth.) Oerst
Pasania blumeana (Korth.) Gamble
Quercus blumeana Korth.
Synaedrys blumeana Korth. (Koidz.)
Understorey tree up to 15 m tall and 25 cm dbh. Stipules ca. 1 mm long.
Leaves alternate, simple, penni-veined, glabrous. Flowers ca. 2 mm diameter,
yellow-white, placed in racemes. Fruits ca. 27 mm diameter, dark purplish brown,
nut basally covered by cupule.
Tree up to 15 m tall, 25 cm diameter. Bark scaly, greyish brown; inner bark fibrous,
brown. Sapwood yellowish. Twigs subglabrous, sparsely lenticellate. Stipules triangular,
c. 2 x 1 mm. Leaves thin-coriaceous, glabrescent above, sparsely appressed brownish
tomentose below; broadly ovate or broadly elliptic or sometimes elliptic-oblong, (8-)12-
16(-23) x (3.5-)5-8.5(-11) cm, base rounded, subcordate or broadly acute, symmetrical,
margin undulate, revolute, apex acuminate, acumen 10-15 mm long; midrib raised on
both surfaces, stronger and sparsely tomentose below; lateral veins thin, 12-15(-17) pairs,
dense, flat above, raised below, faintly joining near the leaf margin, forming an angle
of 30-45 degrees with the midrib; intercostal venation reticulate, dense, obscure above, prominent
below; petiole 10-13 mm long. Inflorescences male, female or androgynous. Male
inflorescences 15-20 cm long; bracts triangular, c. 0.9 x 0.6 mm; bracteoles broadly
ovate, acute, c. 0.3 x 0.2 mm. Male flowers in clusters of 3 along the rachis; perianth
lobes acute, c. 0.7 x 0.5 mm; stamen filaments c. 3 mm long; pistillode globose, c. 1
mm diameter. Female or androgynous inflorescences 10-15 cm long; bracts ovate, c.
0.4 x 0.2 mm; bracteoles subrounded, 0.2-0.3 mm across. Female flowers solitary along
the rachis; perianth lobes acute, c. 0.8 x 0.5 mm; staminodes 12; styles cylindrical, slightly
recurved, c. 1.2 mm long. Cupules solitary along the rachis, with stalk 5-10 mm long,
1-1.5 x 2.5-3 cm, tomentose, lamellate; wall bony, thin, enclosing the acorn almost
completely or for its most part; lamellae slightly distinct, edge denticulate, set in 5-
6 regular lines. Acorns depressed ovoid, 1.5-2 x 2.5-3 cm, glabrous except for a small
part at the apex which is densely simple and stellate hairy; base rounded, apex acute;
scar deeply concave or flat, c. 1.4 cm diameter; wall bony, thin, most part free from
the cupule. [from Tree Flora of Sabah and Sarawak]
In Undisturbed mixed dipterocarp and sub-montane forests up to 1700 m
altitude. Usually along rivers on clay soils.
Peninsular Malaysia and Borneo.