PNGTreesKey – Syzygium subcorymbosum Merr. & L.M.Perry


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

Syzygium subcorymbosum Merr. & L.M.Perry

Journal of the Arnold Arboretum Vol. xxiii: 297 (1942)

Family: Myrtaceae

Timber Group: Occasional timber species

Field Characters: Emergent tree (occasionally up to c. 40 m high) or Large canopy tree (up to 30 m high); Bole cylindrical (up to c. 80 cm diam.); straight (bole up to 25 m long); buttresses buttresses present (buttresses up to c. 3.5 m high); spines spines absent; aerial roots aerial roots absent; stilt roots stilt roots absent; Bark brown, pale red, or grey, slightly rough or almost smooth, scaly or flaky (with irregular flakes) or slightly pustular, lenticels irregular; Subrhytidome (under-bark) pink or green; less than 25 mm thick, (5.0-) 8.0-14.0; bark blaze consisting of one layer; faintly to non-aromatic; pleasant; outer blaze red, pink, or brown, markings absent, fibrous; inner blaze pink, red, or brown, markings absent, fibrous; bark exudate (sap) present or absent, colourless, not readily flowing (spotty), colour changing on exposure to air, to purple or red, 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), simple (a leaf composed of a single blade); petiole present, not winged, attached to base of leaf blade, not swollen; leaves broadest below middle or broadest at or near middle, (3.5-) 5.0-10.0 (-14.0) cm, (2.0-) 3.0-6.5 cm; symmetric, entire, not dissected or lobed, acuminate, venation pinnate, secondary veins open (with many secondary veins), not prominent, but visible, intramarginal veins absent; leaves lower surface green, upper surface dark green, indumentum (hairs) absent; present; domatia absent; stipules absent.

Flowers: Inflorescence terminal or axillary, flowers on a branched axis, cones absent; flowers bisexual, stalked, flowers with many planes of symmetry, 10.0-12.0 mm long, diameter small (up to10 mm diam.) (c. 10 mm diam.); perianth present, with distinct sepals and petals whorls, inner perianth white; 4, free; stamens 100, present, free of each other, free of the perianth (attached to hypanthium); ovary inferior, carpels joined (when more than one), locules 2; styles solitary, 1.

Fruits: Infrutescence arranged on branched axis, fruit 25.0-40.0 mm long, 15.0-20.0 mm diam., yellow, not spiny, fleshy, simple, indehiscent, drupe; seeds 1, much more than 10 mm long (18-20 mm long), not winged, narrow (longer than wide), seed 1-10 mm diam. (c. 10 mm diam.).

Distribution: West Sepik, East Sepik, Morobe, Western, Central, Papuan Islands, New Britain & Bougainville.

Syzygium subcorymbosum
Botanical records
in PNGplants database

Map details