PNGTreesKey – Schuurmansia henningsii K.Schum.


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

Schuurmansia henningsii K.Schum.

Botanische Jahrbucher für Systematik, Pflanzengeschichte und Pflanzengeographie Vol. 9: 210 (1888)

Other Literature: A. Kanis, Handbooks of the Flora of Papua New Guinea 219-221 (1978) Fig. 95.

Family: Ochnaceae

Timber Group: Non-timber species

Field Characters: Small sub-canopy tree (up to 15 m high, rarely to 20 m); Bole cylindrical (10-15 cm diam.); straight (bole up to c. 10 m long); buttresses buttresses absent; spines spines absent; aerial roots aerial roots absent; stilt roots sometimes stilt roots present; Bark grey or brown (often with grey patches), slightly rough or mostly smooth, slightly fissured or sometimes pustular, lenticels rounded/swelling; Subrhytidome (under-bark) green (mottled); less than 25 mm thick, 8.0-10.0; bark blaze consisting of one layer; faintly to non-aromatic; outer blaze white or yellow (pale (cream-coloured), with stripes; inner blaze white or yellow (pale (cream-coloured), with stripes; 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 (although lamina slightly decurrent), attached to base of leaf blade, not swollen; leaves broadest above middle, 6.0-85.0 cm, 1.5-15.0 cm; symmetric, entire, not dissected or lobed, obtuse or acuminate (shortly), venation pinnate, secondary veins open or closed (veins 2-7 mm apart), prominent, intramarginal veins absent; leaves lower surface green, upper surface dull dark green, indumentum (hairs) absent; absent; domatia absent; stipules present, free, laterally placed, not encircling the twig, leafy, not fringed, large (c. 5 mm long), not persistent.

Flowers: Inflorescence terminal, flowers on a branched axis, cones absent; flowers bisexual, stalked, flowers with many planes of symmetry, 2.0-5.0 mm long, diameter small (up to10 mm diam.) (2-5 mm diam.); perianth present, with distinct sepals and petals whorls, inner perianth white or pale pink; 5, free; stamens 5-(stamens and staminodes); (staminodes); (staminodes)-30 (-100), present, free of each other (staminodes) or joined (stamen joined at base to inner staminodes), free of the perianth; ovary superior, carpels joined (when more than one), locules 3; styles solitary, 1.

Fruits: Infrutescence arranged on branched axis, fruit 14.0-25.0 mm long, dark brown or brownish grey, not spiny, non-fleshy, simple, dehiscent, capsule; seeds 100, barely visible (to 1 mm long) (c. 0.5 mm long (excluding wings), winged (wings c. 2.5 mm long), broad (as wide as long), seed less than 1 mm diam. (c. 0.5 mm diam.).

Distribution: West Sepik, Madang, Morobe, Western Highlands, Eastern Highlands, Southern Highlands, Western, Central, Northern, Milne Bay, New Britain & Bougainville.

Schuurmansia henningsii
Botanical records
in PNGplants database

Map details