PNGTreesKey – Eucalyptopsis papuana C.T.White


Barry Conn (NSW) & Kipiro Damas (LAE).
Guide to trees of Papua New Guinea
Copyright held by the authors, National Herbarium of New South Wales, and Papua New Guinea National Herbarium

Eucalyptopsis papuana C.T.White

Journal of the Arnold Arboretum Vol. 32: 139 (1951)

Family: Myrtaceae

Timber Group: Commercial hardwood

Field Characters: Small sub-canopy tree, Large canopy tree (up to 36 m high), or Emergent tree (occasionally up to 45 m high); Bole cylindrical (up to 100 cm diam.); straight (bole up to 27 m long); buttresses buttresses present (buttresses up to 1.5 m high); spines spines absent; aerial roots aerial roots absent; stilt roots stilt roots absent; Bark brown, brownish red, or dark grey, rough, scaly or flaky (oblong flakes, sometimes slightly papery) or fissured; Subrhytidome (under-bark) pink or brown (not strongly defined); less than 25 mm thick, (7.0-) 15.0-23.0; bark blaze with two layers (often weakly defined); strongly aromatic; resinous/linament-like; outer blaze white, yellow (pale (straw-coloured), pink, or pale brown, markings absent, fibrous; inner blaze pink, brown (pale (usually not as definite as in outer part of bark), yellow (pale (straw-coloured), or white, markings absent, fibrous; bark exudate (sap) present or absent, colourless, not readily flowing (spotty), colour changing on exposure to air, to grey or pale brown, not sticky; terminal buds not enclosed by leaves.

Indumentum: Complex hairs absent; stinging hairs absent; mature twig indumentum (hairs) absent.

Leaves: Leaves spaced along branches, opposite (in pairs, opposite one another on the branchlet) (to subopposite), simple (a leaf composed of a single blade); petiole present, not winged, attached to base of leaf blade, not swollen; leaves broadest below middle, (7.5-) 8.0-16.0 cm, (3.2-) 4.0-7.0 cm; symmetric, entire, not dissected or lobed, obtuse or usually acuminate, venation pinnate, secondary veins open, not prominent, but visible or prominent, intramarginal veins absent; leaves lower surface dull green or dull pale green, upper surface green (glossy to subglossy), indumentum (hairs) absent; present; domatia absent; stipules absent.

Flowers: Inflorescence terminal, flowers on a branched axis, cones absent; flowers bisexual, not stalked, flowers with many planes of symmetry, 8.0-10.0 mm long, diameter small (up to10 mm diam.) (8-10 mm diam.); perianth present, petals absent or with all sepals and/or petals (hence tepals) similar, inner perianth green; 5 (sepals), free (joined to hypanthium); stamens 100 (cream-coloured), present, free of each other, free of the perianth (joined to hypanthium); ovary partly inferior, carpels joined (when more than one), locules 2; styles solitary, 1.

Fruits: Infrutescence arranged on branched axis, fruit 6.0-7.0 mm long, 6.0-8.0 mm diam., grey, not spiny, non-fleshy, simple, dehiscent, capsule; seeds 100, about 10 mm long (7-8 mm long), not winged, narrow (longer than wide), seed 1-10 mm diam. (3-5 mm diam.).

Distribution: Morobe, Western Highlands, Southern Highlands, Western, Central, Northern & Milne Bay.

Eucalyptopsis papuana
Botanical records
in PNGplants database

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