PNGTreesKey – Sloanea sogerensis Baker f.


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

Sloanea sogerensis Baker f.

Journal of Botany Vol. 61 Supplement 6: (1923)

Family: Elaeocarpaceae

Timber Group: Non-timber species

Field Characters: Large canopy tree (up to 40 m high) or Small sub-canopy tree (10-25 m high); Bole cylindrical (up to c. 50 cm diam.); straight (bole 10-20 m long); buttresses buttresses present (often buttresses up to 3.5 m high); spines spines absent; aerial roots aerial roots absent; stilt roots stilt roots absent; Bark pale yellow, pale green, grey, or brown, slightly rough or smooth, slightly fissured or scattered pustular, often lenticels elongated vertically or lenticels irregular; Subrhytidome (under-bark) white, pale yellow, pale red, pale purple, or mottled; less than 25 mm thick; faintly to non-aromatic; outer blaze yellow (pale (straw-coloured), pink, or brown, markings absent; inner blaze yellow (pale (straw-coloured), pink, or brown, markings absent; bark exudate (sap) absent; terminal buds not enclosed by leaves.

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

Leaves: Leaves spaced along branches, sub opposite (in pairs, opposite one another on the branchlet) or spiral (leaves occurring singly at a node and arranged spirally up 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, (10.0-) 13.0-24.0 (-32.0) cm, 7.0-15.0 (-23.0) cm; symmetric, entire (occasionally (undulate), finely crenate, or serrate to dentate (toothed) (slightly (teeth often sharp), not dissected or lobed, obtuse or mucronate, venation pinnate, secondary veins open, prominent, intramarginal veins absent; leaves lower surface green, upper surface dark green, indumentum (hairs) present, indumentum (hairs) dense (hairs light brown); absent; domatia absent; stipules present, free, laterally placed, not encircling the twig, leafy (irregular in shape), not fringed (slightly serrate), large (5-27 mm long), less often not persistent or persistent.

Flowers: Inflorescence axillary, flowers on a branched axis, cones absent; flowers bisexual, stalked, flowers with many planes of symmetry, 7.0-10.0 (-14.0) mm long, diameter small (up to10 mm diam.) (8-10 mm diam.); perianth present, with distinct sepals and petals whorls, inner perianth white; 4-6, free; stamens 100, present (short), free of each other, free of the perianth; ovary superior, carpels joined (when more than one), locules 4; styles solitary, 1.

Fruits: Infrutescence single, fruit 30.0-60.0 mm long, dark red or pale brown, spiny (spines weak or stout, up to 20 mm long), non-fleshy, simple, dehiscent, capsule (mostly 4-valved, sometimes 3-valved); seeds 4-12, about 10 mm long, not winged, narrow (longer than wide), seed 1-10 mm diam. (c. 6 mm diam.).

Distribution: West Sepik, East Sepik, Madang, Morobe, Western Highlands, Southern Highlands, Western, Central, Northern, Milne Bay, Papuan Islands, New Britain & New Ireland.

Sloanea sogerensis
Botanical records
in PNGplants database

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