Syzygium muelleri (Miq.) Miq., Fl. Ind. Bat. 1 (1855)

Named after G. Muller [1790-1826], A German soldier, administrator and amateur naturalist in West Kalimantan.

Eugenia muelleri Miq.
Eugenia sarawacensis Merr.
Eugenia venulosa (Wall.) Wall.
Eugenia venulosa var. macrothyrsa King
Eugenia viburnifolia Ridl.
Myrtus obovata (Korth.) Korth. ex Miq.
Syzygium furcatum Korth. ex Miq.
Syzygium obovatum Korth.
Syzygium sarawacense (Merr.) Merr. & Perry
Syzygium venulosum (Wall.) Masamune
Syzygium viburnifolia (Ridl.) Masamune

Mid-canopy tree up to 39 m tall and 113 cm dbh. Stipules absent. Leaves opposite, simple, penni-veined, venation inconspicuous, glabrous. Flowers ca. 14 mm diameter, white, with protruding stamens, flowers placed in panicles. Fruits ca. 16 mm diameter, green-purple, fleshy berries.

Main canopy tree, to 25(-39) m tall, 50(-113) cm diameter, with papery flaky whitish to pale yellow-brown bark, and ribs and thin buttresses to 2 m; sometimes stilt-rooted; inner bark pink-brown. Parts hairless. Twig c.2 mm diameter, round, brownish, smooth or slightly cracked. Leaf blade c.8.5 x 4(3.5-11 x 2-5) cm, broadly elliptic, thinly leathery, drying dull, purplish brown above, grey-brown beneath; base wedge-shaped, tapering into c.7 mm stalk, apex rounded, subacuminate or acumen c. 5mm, blunt; pits obscure above, faintly densely dotted beneath; veins unequal, main veins c.6 pairs the basal pair originating with intramarginal veins and continuing up half the margin, veins slender, unfurrowed, ascending, equally hardly raised but distinct with tertiaries on both surfaces; midrib usually distinctly broadly raised and with median furrow; intramarginal veins 2, the main well within margin, looped. Panicle to 9 cm long, to 3-branched, terminal, conical with the basal branches spreading to 4 cm. Flower bud to 4 x 2.5 mm, slender, obconical-torch-shaped, tapering to c.2 mm pseudostalk, sepal lobes 4, c.1 x 1 mm, small, hemispherical, thick, strongly cupped, appressed to base of domed corolla; stamens many. Fruit to 12 x 10 mm, green, drying dark, broadly pear-shaped or sometimes ellipsoid, somewhat tapering into a short stalk, shallowly ribbed, more or less depressed at apex with c.2 mm diameter small hardly rimmed cavity. [from Tree Flora of Sabah and Sarawak]

In undisturbed mixed dipterocarp, keranga and swamp forests up to 100 m altitude. Usually on swampy, alluvial sites with sandy soils.

The timber is locally used.

Peninsular Thailand, Peninsular Malaysia, Borneo.

Local names
Borneo: Imbak awan, Manguao, Obah, Tatumbuk, Ubah, Ubah urat.