Trees, often ± pachycaulous, or shrubs, monoecious. Leaves often verticillate, sometimes opposite or spirally arranged, paripinnate, 4-40-jugate, without pseudo-stipules; Inflorescences in the axils of bracts or normal leaves, together pseudoterminal, thyrses. Flowers unisexual, monoecious, regular. Sepals 5, slightly connate at base, narrowly imbricate, all equal, margin sometimes slightly petaloid, outside hairy, the margin (partly glandular) ciliolate, inside slightly hairy to glabrous, entire, in fruit persistent and slightly reflexed. Petals 5, as long as or slightly longer than the calyx, shortly clawed to sessile, glabrous or outside at the base and sometimes in the centre, and along the margin slightly hairy, entire, inside either auricled or with two, sometimes with one, erect woolly scale(s), exceptionally (an Australian subspecies of J. javanica) with a crest. Stamens 8 (7-10), in male flowers exserted, spreading; Ovary sessile, hairy, 3-locular; Ovules 1 per locule. Fruits sessile, loculicidal, slightly warty, densely pilose with stiff, irritating hairs, inside also densely pilose. Seeds with a swollen annular sarcotesta around the hilum.
Asia-Tropical: Maluku (Maluku present); New Guinea present, Australasia: Queensland (Queensland present), northern New South Wales present
Two species in the Moluccas, New Guinea, and Australia (Queensland and northern New South Wales).