The Eucalypts
***
Icons
of the
Australian
Bush
EucaLink         A Web Guide to the Eucalypts
Corymbia polycarpa

Corymbia polycarpa (F. Muell.) K.D. Hill & L.A.S. Johnson, Telopea 6: 254 (1995).
Eucalyptus derbyensis D.J. Carr & S.G.M. Carr, Eucalyptus 2: 189 (1987).
TYPE: Western Australia, on street verge in Derby, M.I. Blackwell, Derby 14 (holo PERTH, iso FRI DNA MELB)
Eucalyptus polycarpa F. Muell., J. Linn. Soc., Bot. 3: 88 (1859).
TYPE: Northern Territory, Arnhem Land, F. Mueller, 25 July 1856 (holo MEL, iso K).
Eucalyptus erubescens D.J. Carr & S.G.M. Carr, Eucalyptus 2: 184 (1987).
TYPE: Northern Territory, 2 km SE of Darwin near Stuart Highway, S.G.M. Carr 41, 4 Apr 1966 (lecto CANB ex FRI, iso DNA, MEL). The holotype sheet of this name bears a mixture, comprising elements of C. polycarpa (leafy twigs bearing buds, and loose fruits) and C. porrecta (leafy twigs bearing fruits). We here designate the portion in CANB bearing leaves and buds as the lectotype, thus causing the name to fall into the synonymy of C. polycarpa. The concept of E. erubescens as applied by its authors largely covered hybrids between C. polycarpa and C. ptychocarpa (see Appendix 1).


Habit: Tree, Height to 25 m high.
Bark: Bark persistent throughout, tessellated, grey to pale brown. Pith glands present; Bark glands present. Cotyledons suborbicular.
Leaves: Juvenile leaves disjunct from node 3–5, lanceolate to ovate, hispid with bristle glands only, petiolate. Intermediate leaves disjunct early, lanceolate to elliptic, straight, entire, dull green, petiolate. Adult leaves disjunct, narrow lanceolate to lanceolate, not falcate, acute or acuminate, basally tapered, dull, grey-green, thin, discolorous. Lateral veins obscure, obtuse, closely spaced. Intramarginal vein distinct, continuous.
Inflorescences: Conflorescence compound, terminal; Umbellasters 7-flowered, regular. Peduncles terete or narrowly flattened or angular (to 3mm wide), 8–25 mm long. Pedicels terete, 5–10 mm long.
Flowers: Buds ovoid to clavate, glaucous or not glaucous or pruinose, 9–13 mm long, 5–8 mm diam. Calyx calyptrate; persisting to anthesis. Calyptra hemispherical, 0.33–0.5 times as long as hypanthium, narrower than hypanthium; smooth. Hypanthium smooth and scurfy. Flowers white, or cream.
Fruits: Fruits urceolate, pedicellate, 4 locular, 18–35 mm long, 11–16 mm diam. Calyptra scar flat, 0.2–0.5 mm wide. Disc depressed. Valves enclosed. Seeds regular and laterally compressed, cymbiform or ovoid, shallowly reticulate, dull to semi-glossy, red-brown. Hilum terminal. Chaff linear, chaff same colour as seed.

Distribution: W.A., or N.T., or Qld.

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