Billardiera longiflora is a species of flowering plant in the family Pittosporaceae and is endemic to Tasmania.

It is a woody twiner or climber that has variably-shaped, often elliptic leaves, often varying with altitude, and greenish-yellow, pendent, tube-shaped flowers arranged singly and turning blue as they age.

This species is often confused with the similar Billardiera macrantha of south-eastern Australia, including Tasmania.

[2] Billardiera longiflora was first formally described in 1805 by Jacques Labillardière in his Novae Hollandiae Plantarum Specimen.

[3][4] The specific epithet (longiflora) means "long-flowered",[5] but this species has shorter flowers that the more common B. macrantha with which it is often confused.