Boronia coerulescens, commonly known as blue boronia, is a plant in the citrus family, Rutaceae and is endemic to southern Australia. It is a small, spindly shrub with glandular stems, small, more or less cylindrical leaves and blue to pinkish mauve, four-petalled flowers. There are two subspecies endemic to Western Australia and a third that also occurs in three eastern states.
Boronia coerulescens is an erect shrub that grows to a height of 0.2–0.6 m (0.7–2 ft) with branchlets that are warty glandular. ...