PNGTreesKey – Palaquium warburgianum Schltr.ex K.Krause


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

Palaquium warburgianum Schltr.ex K.Krause

Botanische Jahrbucher für Systematik, Pflanzengeschichte und Pflanzengeographie Vol. lviii: 471 (1923)

Other Literature: P. van Royen, Blumea 520-522 (1960) Fig. 12.

Family: Sapotaceae

Timber Group: Major exportable hardwood

Field Characters: Large canopy tree (up to 44 m high); Bole cylindrical (up to c. 100 cm diam.); straight (bole up to c. 20 m long); buttresses buttresses present (buttresses up to c. 1.5 m high); spines spines absent; aerial roots aerial roots absent; stilt roots stilt roots absent; Bark brown, rough or slightly smooth, finely fissured or pustular, slightly lenticels elongated laterally or lenticels elongated vertically; less than 25 mm thick; bark blaze consisting of one layer; faintly to non-aromatic; outer blaze pale yellow, pink, red, brown, or mixed colours, markings absent; inner blaze pale yellow, pink, red, brown, or mixed colours, markings absent; bark exudate (sap) present, white/milky, flowing, 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, 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, 9.0-12.0 cm, 4.5-5.5 cm; symmetric, entire, not dissected or lobed, rounded, venation pinnate, secondary veins open, prominent, intramarginal veins absent; leaves lower surface pale green, upper surface pale green, indumentum (hairs) absent; absent; domatia absent; stipules absent.

Flowers: Inflorescence axillary, flowers single, cones absent; flowers bisexual, stalked, flowers with many planes of symmetry, 5.0-7.0 mm long, diameter small (up to10 mm diam.) (c. 6 mm diam.); perianth present, with distinct sepals and petals whorls, inner perianth pale yellow or pale brown; 5-6, some or partly joined; stamens 5-6, present, free of each other, joined to the perianth; ovary superior, carpels joined (when more than one), locules 5-6; styles solitary, 1.

Fruits: Infrutescence single, fruit 20.0-25.0 mm long, green (probably immature), not spiny, fleshy, simple, indehiscent, berry; seeds 1-3, to about 5 mm long (c. 2.5 mm long), not winged, broad (as wide as long) (laterally flattened), seed 1-10 mm diam. (c. 2 mm diam.).

Distribution: West Sepik, Madang, Morobe, Northern, Milne Bay & New Britain.

Palaquium warburgianum
Botanical records
in PNGplants database

Map details