Australian Journal of
Taxonomy
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Dichapetalum Thouars
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Genera Nova Madagascariensia: 23 (1806).

Type: Dichapetalum madagascariense Poir. (fide Poiret 1812: 470).

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Dichapetalum in Australia: Monoecious or dioecious scrambling shrubs or vines, sometimes with back-arching stems that aid climbing; indumentum simple trichomes (or stellate on the fruit of D. auranticarpum); stipules present, often caducous; petioles sub-peltate, thickened and tapering onto abaxial midrib. Leaves simple, alternate; margin often repand; base often asymmetrical; orbicular glands may be present on either or both abaxial and adaxial surfaces, presumably they are nectiferous given that they are frequently eaten by insects. Inflorescences are axillary or terminal, mostly dichotomously branched or glomerulous, bracteate; pedicels articulated. Flowers actinomorphic, monoecious or dioecious; calyx lobes connate at base, sepals 5, imbricate; petals 5, free, bilobed and emarginate; stamens 5, adnate to base of petal lobes, episepalous and inserted between disk lobes; anther introrse; 5 non-nectar producing staminodes surround the ovary (sometimes referred to as a hypogynous glands, disk glands, nectiferous glands or disk-lobes [Breteler 1973: 26–27]); ovary 2- or 3-locular; style connate; stigma 2- or 3-lobed. Fruit a capsule or a drupe; sepals, petals and stamens persist at base; seeds 1–3.

Etymology: Dichapetalum from dicho (paired) and petalon (petal), referring to the often bilobed petals.