Cinnamomum sintoc Blume, Bijdr. (1826)

Synonyms
Cinnamomum cinereum Gamble
Cinnamomum calophyllum Reinw. ex C.Nees
Cinnamomum camphoratum Blume

Diagnostics
Mid-canopy tree up to 40 m tall and 90 cm dbh. Stipules absent. Leaves (sub)-opposite, simple, tripli-veined, glabrous, rather tough leaves. Flowers ca. 4 mm diameter, white-yellow, placed in panicles. Fruits ca. 19 mm long, fleshy drupes placed on swollen flower base.

Description
Tree to 40 m tall, to 90 cm diameter. Bark smooth, light brown; inner bark reddish brown, strongly smelling of nutmeg. Twigs stout, terete, 1.5-2.5 mm diameter, glabrous, drying blackish. Terminal buds not perulate, conical, c. 2 mm long, glabrous. Leaves opposite or subopposite, drying brownish, triplinerved, thickly coriaceous, glabrous below; blade not bullate, without domatia, elliptic to ovate-elliptic, (8-)9-13(-20) by 3-5(-8) cm, base cuneate, apex acute; midrib raised on both surfaces, to 1 mm broad; lateral veins raised on both surfaces, extending to 1/2-2/3 the length of leaf blade; major intercostal veins subscalariform-reticulate, faint, 3-5 mm apart, less prominent than midrib; minor intercostal veins faint, reticulate; petiole slender, drying blackish, discolorous to blade, 1-1.5 cm long, 1-1.5 mm diameter, channelled above. Inflorescences axillary and/or subterminal, stout, paniculate- cymose with first to second order branching, 5-8 cm long; rachis c. 1 mm broad, hairy. Flower densely hairy; pedicel c. 2 mm long; hypanthium c. 1.5 mm high, distinct; perianth lobes elliptic, c. 2 mm long, hairy on both sides; fertile stamens c. 2 mm long, anthers 4-locular, ovoid with truncate tip, filaments c. 2/3 the length of stamen; glands sessile on each side at the middle or lower half of filaments; staminodes c. 1 mm long, sagittate; ovary ellipsoid, c. 1 mm long, stigma peltate. Infructescence 10-20 cm long; rachis 1-1.5 mm broad, sparsely hairy. Fruits ellipsoid or obovoid, c. 10 by 8 mm; cupule cup- shaped, deep, c. 6 mm high, c. 8 mm diameter, rim entire, not undulating, glabrous; perianth lobes caducous; pedicel terete, c. 2 mm long, c. 1.5 mm diameter, ridged horizontally. [from Wild Cinnamon of Borneo]

Ecology
In undisturbed mixed dipterocarp and sub-montane forests up to 1700 m altitude. Mostly on hillsides and ridges with sandy soils.

Uses
The bark is used medicinally as a treatment against diarrhea and other intestinal complaints, and as an disinfectant on wounds (powder).

Distribution
Peninsular Thailand, Peninsular Malaysia, Sumatra, Java, Lesser Sunda Islands, Borneo.

Local names
Borneo: Sintuk madu.