petraea is a subspecies of flowering plant in the family Rutaceae and is endemic to a small area in Victoria, Australia.

It is an erect shrub with leathery, egg-shaped leaves with the narrower end towards the base, and white flowers arranged singly or in groups of up to four in leaf axils.

petraea is an erect shrub that typically grows to a height of 1 m (3 ft 3 in) with glabrous, green, prominently glandular-warty stems.

[2][3] This subspecies was first formally described in 2001 by Andrew Carl Frank Rozefelds in the journal Muelleria from specimens collected on Mount Stewart in East Gippsland in 1995.

[3][4] This subspecies is only known from the summit of Mount Stewart near Gelantipy where it grows in rocky shrubland at an altitude of about 800 m (2,600 ft).