Monoecious or dioecious climbing or creeping shrub, sometimes a small and slender tree up to 10 m; stem 3-5 cm diam. Branchlets glabrous or long reMain ing fulvous-or ferrugineous-tomentose, afterwards purple-brown to greyish. Leaves (oblong to) ovate to obovate, 7-18 by 3-10 cm, herbaceous to chartaceous (rarely subcoriaceous), pubescence variable, usually tomentose on midrib and nerves above, lower surface all over more or less densely pubescent, rarely fully glabrous; glands (absent or) near the base, usually on the upper, sometimes on the lower surface of the leaf, rarely on both sides; base equilateral or oblique, acute to rounded, sometimes decurrent; margin revolute; apex usually abruptly acuminate, acumen short, cuneate, subacute, sometimes mucronate; nerves (5-)6-8(-12) pairs, usually rather distant, strongly curved, often distinctly interarching at some distance from the margin. Inflorescences repeatedly dichotomously branched, usually rather long-stalked, sometimes subsessile with 2 collateral small inflorescences in one axil, (1-)5-7(-10) cm long, many-flowered, densely tomentose. Flowers 2.5-4 mm long, uni-or bisexual. Petals spathulate (to rhomboid), slightly to more than halfway incised, glabrous or more or less densely pilose outside, sometimes rather caducous. Disk-lobes usually c. 0.5 mm, 2-lobed, glabrous (rarely with some hairs), sometimes spathulate and up to 1 mm, not rarely absent. Ovary densely woolly pubescent, 2-3-celled; styles usually nearly entirely connate. Fruits 1-6, globular to ovoid or more or less pear-shaped or cordate, c. 1.5-2.5 cm diam., densely fulvous velvety pubescent, (golden-)brown when fresh; pericarp apparently thick and fleshy, without sutures; seeds 1-3.
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A slender straggly shrub. It can also be a climber. The stems are 3-5 cm across. The young branches are covered with soft rusty coloured hairs. The leaves are 7-18 cm long by 3-10 cm wide. The young leaves are edible. Flower clusters are in the axils of leaves. The flower clusters are 2-4 cm long with flowers about 0.4 cm long. They are dull and hairy. Flowers can be of one or both sexes. Fruit are 1.5-2.5 cm across and pear-shaped. They are yellow or golden brown. They contain 1-3 seeds.
See Hyland et al. (2010) and Northern Territory Government (2013).
Allosyncarpia dominated rainforest in protected sandstone gorges usually on scree slopes where there is some soil and leaf litter accumulated but no grass layer; favouring moister and more protected sites, avoiding the driest and more open forests.
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In primary and secondary forests, apparently preferably along the edges, on river-banks, etc., Stems sometimes hollow and inhabited by ants. 0-1800 m. Fl. Jan.-Dec. (in the Philippines mainly April-June); fr. Jan.-Dec.
It is a tropical plant. It does best in a well drained soil and a partly shaded position.
Grows in lowland rainforest and gallery forest.