PNGTreesKey – Prunus costata (Hemsl.) Kalkman
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
Blumea Vol. 13: 78 (1965)
Other Literature: C. Kalkman, Flora Malesiana, Series 1 334 (1993)
Timber Group: Occasional timber species
Field Characters: Small sub-canopy tree (mostly 10-25 m high); Bole cylindrical (10-30 cm diam.); straight; buttresses buttresses absent; spines spines absent; aerial roots aerial roots absent; stilt roots stilt roots absent; Bark grey or pale brown, slightly rough, slightly fissured or slightly pustular, lenticels irregular; Subrhytidome (under-bark) pink; less than 25 mm thick; bark blaze with two layers; strongly aromatic; almond-like; outer blaze pale brown, markings absent; inner blaze white or yellow (pale (straw-coloured), markings absent; 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 at or near middle, 3.0-13.0 (-16.0) cm, 2.0-7.0 cm; symmetric, entire, not dissected or lobed, rounded or obtuse, venation pinnate, secondary veins open, prominent, intramarginal veins absent; leaves lower surface pale green or green, upper surface dark green, indumentum (hairs) absent when mature; absent or present (when present, with 2-4, flat basal glands); domatia absent; stipules absent.
Flowers: Inflorescence leaf-opposed, flowers on an unbranched axis, cones absent; flowers bisexual, stalked, flowers with many planes of symmetry, 3.0-6.5 mm long, diameter small (up to10 mm diam.) (c. 4 mm diam.); perianth present, with distinct sepals and petals whorls, inner perianth white; 4-6, free or some or partly joined (by misinterpretation (sepals and petals joined to mouth of floral tube); stamens 20-35, present, free of each other, free of the perianth or joined to the perianth (by misinterpretation (stamens joined to mouth of floral tube, separate from the petals and sepals); ovary superior, carpels joined (when more than one), locules 1; styles solitary, 1.
Fruits: Infrutescence arranged on unbranched axis, fruit 6.0-10.0 mm long, red or purple, not spiny, fleshy, simple, indehiscent, drupe; seeds 1, to about 5 mm long (c. 5-6 mm long), not winged, broad (as wide as long) (testa hairy), seed 1-10 mm diam. (4-5 mm diam.).
Distribution: Western Highlands, Eastern Highlands, Southern Highlands, Western, Central & Milne Bay.
in PNGplants database