Xanthosia ternifolia is a species of flowering plant in the family Apiaceae and is native to Tasmania and New South Wales.

Xanthosia ternifolia is an erect shrub that typically grows to a height of up to 40 cm (16 in), its stems and leaves covered with woolly hairs.

The flowers are arranged in a on the ends of branches or in leaf axils in a compound umbel on a peduncle up to 10 mm (0.39 in) long with up to 4 flowers.

There are yellow petal-like involucral bracts 3–6 mm (0.12–0.24 in) long at the base of the flowers.

[2] Xanthosia ternifolia was first formally described in 2000 by J.M.Hart and Murray J. Henwood in Australian Systematic Botany.