The Eucalypts
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Australian
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EucaLink         A Web Guide to the Eucalypts
Corymbia trachyphloia

Corymbia trachyphloia (F. Muell.) K.D. Hill & L.A.S. Johnson, Telopea 6: 227 (1995).
Eucalyptus trachyphloia forma fruticosa Bailey, Queensland Agric. J. 25: 9 (1910).
TYPE: Queensland, top of Glasshouse Mountains, F.M. Bailey, July 1879 (holo BRI, iso MEL). Type citation: '... observed on the Glasshouse Mountains - ...'
Eucalyptus trachyphloia F. Muell., J. Linn. Soc., Bot. 3: 90 (1859).
TYPE: Queensland, on hills near the Burnett River, F. Mueller, Dec 1856 (holo MEL, iso BM, K). type citation: 'Hab. In collibus ad flumen Burnett. Anth. Sept. Oct.'.


Habit: Tree, Height to 25 m high.
Bark: Bark persistent throughout or persistent to smaller branches, tessellated, pale brown to yellow-brown, dull, cream to grey-brown (above), shedding in short ribbons. Branchlets green. Pith glands present; Bark glands absent. Cotyledons suborbicular.
Leaves: Juvenile leaves disjunct from node 3–5, lanceolate to ovate, hispid with simple hairs and bristle glands, petiolate. Intermediate leaves disjunct early, elliptic to ovate, straight, entire, glossy green, petiolate, 14 cm long, 6 mm wide. Adult leaves disjunct, narrow lanceolate to lanceolate, falcate, acute or acuminate, basally tapered, glossy, green or grey-green, thin, discolorous, 7–12 cm long, 9–21 mm wide; Petioles narrowly flattened or channelled, Petioles 10–17 mm long. Lateral veins obscure, obtuse, closely spaced. Intramarginal vein distinct, continuous.
Inflorescences: Conflorescence compound, terminal; Umbellasters 7-flowered, regular. Peduncles narrowly flattened or angular (to 3mm wide), 5–13 mm long. Pedicels terete, 2–6 mm long.
Flowers: Buds clavate to pyriform, not glaucous or pruinose, 3–5 mm long, 2–3 mm diam. Calyx calyptrate; persisting to anthesis. Calyptra patelliform (slightly beaked), 0.25–0.33 times as long as hypanthium, narrower than hypanthium; smooth. Hypanthium smooth. Flowers white, or cream.
Fruits: Fruits urceolate, pedicellate, 3–4 locular, 6–10 mm long, 5–8 mm diam. Calyptra scar flat, 0.2–0.5 mm wide. Disc depressed. Valves enclosed. Seeds regular and flattened, patelliform, shallowly reticulate, dull to semi-glossy, red or red-brown. Hilum terminal. Chaff linear, chaff same colour as seed.

Occurrence: Locally abundant but sporadic, in dry sclerophyll woodland on shallow infertile soils on sandstone, granite or acid volcanics; north from Goulburn R.
Distribution: Qld, or N.S.W. N.S.W. regions North Coast, or North Western Slopes, or Central Western Slopes.

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