PNGTreesKey – Alstonia brassii Monach.
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
Pacific Science Vol. 3: 166 (1949)
Timber Group: Minor hardwood Tradename: Hard Alstonia
Field Characters: Large canopy tree (up to 25 m high) or Small sub-canopy tree; Bole cylindrical (c. 30 cm diam.); straight (bole c. 5 m long); buttresses buttresses present; spines spines absent; aerial roots aerial roots absent; stilt roots stilt roots absent; Bark white or greenish grey, slightly rough or almost smooth, pustular, lenticels rounded/swelling; Subrhytidome (under-bark) green; less than 25 mm thick, 8.0 (c.); bark blaze with two layers; strongly aromatic; unpleasant; outer blaze white (cream-coloured), markings absent, fibrous or granular with splinters and granular without splinters; inner blaze yellow to orange, markings absent, fibrous to granular with splinters and granular without splinters; bark exudate (sap) present, colourless (twigs with white exudate), not readily flowing (spotty), colour not changing on exposure to air, 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, 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 above middle, 11.0-15.0 cm, 4.5-5.0 cm; symmetric, entire, not dissected or lobed, obtuse, venation pinnate, secondary veins open, prominent, intramarginal veins absent; leaves lower surface pale green, upper surface green, indumentum (hairs) absent; present; domatia absent; stipules absent.
Flowers: Inflorescence terminal and axillary (near end of branches), flowers on a branched axis, cones absent; flowers bisexual, stalked, flowers with many planes of symmetry, 5.0 mm long, diameter small (up to10 mm diam.) (4-5 mm diam.); perianth present, with distinct sepals and petals whorls (with corolla lobes twisted in bud), inner perianth white; 5, some or partly joined; stamens 5, present, free of each other, joined to the perianth; ovary superior, carpels joined (when more than one), locules 2; styles solitary, 1.
Fruits: Infrutescence arranged on branched axis, fruit 350.0-750.0 mm long, brown, not spiny, non-fleshy, simple, dehiscent, legume; seeds 100, about 10 mm long (8-10 mm long), not winged (with tuft of dark red-brown hairs, to 10 mm long), narrow (longer than wide), seed 1-10 mm diam. (c. 3 mm diam.).
Distribution: West Sepik, East Sepik, Madang, Morobe, Western Highlands, Eastern Highlands, Southern Highlands, Western, Central, Papuan Islands, New Britain, New Ireland & Bougainville.
in PNGplants database