Barry Conn (NSW) & Kipiro Damas (LAE).
Copyright held by the authors, Royal Botanic Gardens and Domain Trust, and Papua New Guinea National Herbarium

Gymnacranthera paniculata var. zippeliana (Miq.) Sincl.

Garden's Bulletin, Singapore Vol. 17: 108 (1958) Fig. 3.

Other Literature: D.B. Foreman, Handbooks of the Flora of Papua New Guinea Vol. 1: 178-180 (1978) Fig. 85.

Field Characters: Large trees 20-25 m high or small trees. Bole cylindrical 20-25 cm diam.; straight; buttresses absent; spines absent; aerial roots absent; stilt roots absent. Bark brown, rough, pustular; lenticels irregular; subrhytidome dark green; bark thickness <25 mm thick, 8.0 mm thick; blaze consisting of one layer; faintly to non-aromatic; outer blaze red, speckled, fibrous; inner blaze red, speckled, fibrous; exudate present, colourless, spotty, changing colour on exposure to air, to red, slightly sticky. Terminal buds not enclosed by leaves; complex hairs absent; stinging hairs absent; mature twig without hairs.

Leaves: Spaced along branches <internodes readily visible>. Leaves spiral, simple; petiole present, not winged, attached to base of leaf blade <not peltate>, not swollen; lamina broadest at or near middle, 13.5-18.0 cm long, 4.5-6.0 cm wide; lamina symmetric, margin entire, not dissected or lobed, apex acuminate, venation pinnate <secondary veins arising from the midrib along its length>, secondary veins open <spaced far apart to easily see tertiary veins>, prominent, intramarginal veins absent; lower surface pale green, upper surface green, hairs absent; oil dots absent; domatia absent; stipules absent.

Flowers: Inflorescence axillary <from between a leaf and branch>. Flowers on a branched axis; flowers unisexual, with male and female flowers on different plants <dioecious>, flowers stalked, with many planes of symmetry <actinomorphic>, 4.0 mm long, small (< or =10 mm diam.) 3 mm diam.; perianth present, with all sepals and/or petals (hence tepals) similar, yellow or orange; inner perianth 4, all joined; stamens 8, filaments present, free of each other, joined to perianth <epipetalous/episepalous> ovary superior <seated above petals and sepals; hypogenous>, carpels joined (when more than one) <syncarpous>, locules 1; styles absent stigma minutely 2-lobed.

Fruits: Fruits arranged on branched axis. Fruit 30 mm long, 25.0 mm diam., fruit pale brown, not spiny, fleshy, simple, dehiscent, capsule. Seeds 1, much more than 10 mm long 15 mm long, not winged, longer than wide, 1-10 mm diam. 10 mm diam.

Distribution: Morobe.

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