PNGTreesKey – Pimelodendron amboinicum Hassk.


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

Pimelodendron amboinicum Hassk.

Verslagen en Mededeelingen van de Afdeeling Natuurkunde; Koninklijke Akademie van Wetenschappen Vol. 3: 140 (1855)

Other Literature: T. Djarwaningsih, Blumea 412 (2004)

Family: Euphorbiaceae

Timber Group: Minor hardwood Tradename: Pimeleodendron

Field Characters: Large canopy tree (15-35 m high) or Small sub-canopy tree; Bole cylindrical (mostly 30-90 cm diam.); straight (bole up to 20 m long); buttresses sometimes buttresses present or usually buttresses absent; spines spines absent; aerial roots aerial roots absent; stilt roots stilt roots absent; Bark brown, smooth; Subrhytidome (under-bark) brown; less than 25 mm thick, 10.0-12.0; bark blaze consisting of one layer; faintly to non-aromatic; outer blaze pale brown, markings absent, smooth; inner blaze pale brown, markings absent, smooth; bark exudate (sap) present, white/milky, not readily flowing (spotty), colour not changing on exposure to air, sticky; terminal buds not enclosed by leaves.

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

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 at or near middle, (9.0-) 10.0-19.0 cm, (4.0-) 5.0-8.0 cm; symmetric, entire or broadly crenate, not dissected or lobed, acuminate (shortly), venation pinnate, secondary veins open, prominent, intramarginal veins absent; leaves lower surface pale green, upper surface green, indumentum (hairs) absent; absent; domatia absent; stipules absent.

Flowers: Inflorescence axillary, flowers on a branched axis, cones absent; flowers unisexual, unisexual with male and female flowers on different plants, stalked, flowers with one plane of symmetry, 2.0-3.0 mm long, diameter small (up to10 mm diam.) (c. 1 mm diam.); perianth present, petals absent; stamens 100, present (short), joined; ovary superior, carpels joined (when more than one), locules 2; styles absent.

Fruits: Infrutescence arranged on branched axis, fruit (8.0-) 10.0-20.0 mm long, red (pear-shaped), not spiny, fleshy, simple, indehiscent, berry or drupe; seeds 1, about 10 mm long (10-13 mm long), not winged, broad (as wide as long), seed 1-10 mm diam. (7-10 mm diam.).

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

Pimelodendron amboinicum
Botanical records
in PNGplants database

Map details

Flowers (illustr: T. Djarwaningsih).