Billardiera speciosa is a species of flowering plant in the family Pittosporaceae and is endemic to southern Western Australia.

It is a slender climber that grows in coastal heath and has narrowly elliptic leaves with the edges rolled under and groups of purple or mauve flowers.

[2][3] This species was first formally described in 1837 by Stephan Endlicher who gave it the name Pronaya speciosa in Enumeratio plantarum quas in Novae Hollandiae ora austro-occidentali ad fluvium Cygnorum et in sinu Regis Georgii collegit Carolus Liber Baro de Hügel from an unpublished description by Charles von Hügel of a specimen collected by Ferdinand Bauer near King George Sound.

[4][5] In1862, Ferdinand von Mueller transferred the species to the genus Billardiera in The Plants Indigenous to the Colony of Victoria.

[8] Billardiera speciosa grows in coastal heath on limestone between East Mount Barren and Duke of Orleans Bay in the Esperance Plains bioregions of southern Western Australia.