Threlkeldia diffusa R.Br.

Much-branched prostrate to erect perennial to 30 cm high, sparsely pilose in leaf axils, otherwise glabrous. Leaves obovoid and c. 5 mm long, to slender and subterete and 20–30 mm long, acute, succulent. Perianth tube succulent, cylindrical, c. 1 mm high, glabrous, the lobes 3, membranous, c. 0.5 mm long, puberulous. Stamens 3. Fruiting perianth ovoid to urceolate, 1.5–2.5 mm high, succulent outside, woody within; tube extending upwards to form a fleshy cup-shaped outgrowth c. 0.5 mm high obscuring and overlapping the perianth lobes and on drying forming 3 (or 4) short intertepaline knobs. Seed horizontal to slightly oblique; radicle erect.

It grows in tropical and temperate places. It grows on limestone outcrops. It also grows on limy soils. It does best in a light to medium, well-drained soil. It needs an open sunny position. It is resistant to drought and frost. In Tasmania it grows on the islands. It is usually near the seashore. Tasmania Herbarium.

It can be grown from tip cuttings.