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.