Citrus glauca (Lindl.) Burkill

Deciduous tree to 7 (–12) m high and bole to 15 cm diam. with pendulous branches, or tangled spiny shrub; far-spreading root-suckers heavily armed and sometimes flowering and fruiting; spines solitary, sometimes curved, to 6 cm long on young shoots but usually less. Leaves: petiole c. 2 mm long, unwinged; lamina oblong, linear-or elongate-obcuneate to sublinear, (10–) 30–40 (–55) mm long, (2–) 4–12 mm wide, cuneate at base, entire to crenulate, obtuse to emarginate, adpressed grey-hairy. Flowers solitary or in small axillary cymes, bisexual (possibly sometimes not), sweetly scented. Sepals 1–2 mm long, united basally by shallow cup. Petals 3–5, linear-oblong, 4–6 mm long, greenish white to yellow. Stamens (3 or) 4 times as many as petals, free or rarely weakly coherent at base. Ovary 3-locular, each locule with 2 ovules. Fruit subglobular or obovoid, 12–15 mm diam., lemon-coloured when ripe. Seeds 2–4, 5–6 mm long, yellowish grey, furrowed; embryo solitary.

A tropical plant. It occurs naturally in the semi arid regions of Queensland, New South Wales and South Australia in Australia. It is very drought tolerant. It can stand extremes of temperature from 45°C to-24°C. It grows on a wide range of soil types. The soils need to be well drained. It suits hardiness zones 9-12.

The fruit can be used whole in cooking. They are also used for drinks, jams and preserves. It can be used for marmalade, sauces and dressings.

Plants can be grown from seed, stem cuttings, root cuttings, suckers or budding. If trees are disturbed they easily form suckers that can be removed and planted.