Duboisia leichhardtii (F.Muell.) F.Muell.

Tall shrub or small tree to 12 m high; bark thick and corky towards base. Leaves almost sessile or with petiole to 8 mm long; lamina narrowly ovate-elliptic, rarely narrowly ovate or narrowly elliptic, 5–13 cm long, 7–20 mm wide, concolorous. Inflorescence broadly pyramidal; bracts 0.5–2.5 mm long; pedicels 10–16 mm long. Calyx 1.5–3 mm long, the lobes about half as long as tube. Corolla 13–19 mm long; tube 4–4.5 mm diam. at apex; lobes very narrowly triangular to almost linear, 6.5–11.5 mm long with narrowly acute apex. Stamens 4, the shorter pair 2.4–3.0 mm long and the longer pair 3.3–4.2 mm long; staminode absent. Style 2.5–4 mm long, exceeding upper stamens by 0.5–1 mm. Berry globose, 4–5 mm diam., purple-black; fruiting pedicels to 20 mm long. Seeds 4–13 per fruit, 2.5–3 mm long.

Grows in fertile loam, often in softwood scrub and in disturbed sites.

Contains tropane alkaloids and was in the past harvested as a source of hyoscine for medicinal drugs. A higher-yielding hybrid between Duboisia leichhardtii and D. myoporoides is cultivated commercially for hyoscine production.

Can be grown by seedlings.