Duboisia (commonly called corkwood tree) is a genus of small perennial shrubs and trees up to 14 metres (46 feet) tall, with extremely light wood and a thick corky bark. There are four species; all occur in Australia, and one also occurs in New Caledonia.

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Then I also have larger ones priced accordingly. Plants under 1 metre can be posted. Larger ones by courier or pickup only

The alternate, glabrous leaves are narrow and elliptical. The inflorescence is an open cymose panicle of apically small white flowers, sometimes with a purple or mauve striped tube. They flower profusely in spring. The fruit is a small, globular, black, juicy berry.

Aboriginal Australians sometimes chew the nicotine-containing leaves of Duboisia hopwoodii (see entry on pituri) mixed with wood ash for their stimulant and, after extended use, depressant effects. The leaves of Duboisia leichhardtii and Duboisia myoporoides also contain scopolamine and hyoscyamine, along with some other pharmaceutically important alkaloids. A derivative of scopolamine is the drug butylscopolamine, a potent peripherally acting antispasmodic. These trees are commercially grown for the pharmaceutical industry.

The genus was named by Robert Brown in honour of Louis DuBois who wrote Méthode éprouvée, avec laquelle on peut parvenir facilement et sans maître à connaître les plantes de l’intérieur de la France et en particulier celles des environs d’Orléans, par M. Dubois, théologal de l’église d’Orléans, ancien démonstrateur du Jardin des plantes (1803).

Melicope elleryana, commonly known as pink flowered doughwood, pink evodia, corkwood, or saruwa,is a species of rainforest shrub or tree in the family Rutaceae, and is native to New Guinea, parts of eastern Indonesia, the Solomon Islands and northern Australia. It has trifoliate leaves and pink to white, bisexual flowers arranged in panicles in leaf axils.


Melicope elleryana is a shrub or tree that typically grows to a height of 18–25 m (59–82 ft) with a trunk diameter of about 60 cm (24 in). The bark is pale brown and corky, especially at the base of the trunk. The leaves are arranged in opposite pairs and trifoliate on a petiole 20–110 mm (0.79–4.33 in) long. The leaflets are elliptical, sometimes egg-shaped, 55–200 mm (2.2–7.9 in) long and 35–80 mm (1.4–3.1 in) wide, the end leaflet on a petiolule 5–17 mm (0.20–0.67 in) long. The flowers are bisexual and arranged in panicles 25–60 mm (0.98–2.36 in) long. The sepals are round to egg-shaped, 1.3–2 mm (0.051–0.079 in) long and joined at the base. The petals are pink to white, 3.5–6.5 mm (0.14–0.26 in) long and there are four stamens. Flowering occurs from November to February and the fruit consists of up to four follicles 5–8 mm (0.20–0.31 in) long, containing shiny black seeds 2–3 mm (0.079–0.118 in) in diameter.

Corkwood leaves

The leaves of corkwood (Duboisia myoporoides) a native tree of the rainforests of northern NSW and southern Queensland contain a large proportion of an alkaloid (hyosine) which is used to treat stomach ulcers and sea sickness. The production of corkwood foliage on the north coast of NSW has been a steady if not large industry. The collected leaves are dried out of the sunlight and sold overseas to pharmaceutical firms to extract the alkaloidal constituents. Boehringer Ingelheim has an Australian plantation of 1,400 hectares in northern NSW which employs 20 people in the harvesting of Duboisia myoporoides leaves for the drug Buscopan.

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Author: Henry

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