The genus is endemic to a small area in the south-west of Western Australia and is intermediate in character between Eremophila and Myoporum.

There are four members of the genus, all of which are small shrubs with stems and leaves which produce a resin making the plants appear bluish-green.

Despite their limited distribution, they often occur in populations of several thousand individual plants, forming a dense ground cover.

(Bob) Chinnock in Eremophila and allied genera : a monograph of the plant family Myoporaceae and the first species he named was Diocirea violacea.

Although their distribution is restricted, they often grow in populations of thousands forming a dense ground cover sometimes to the exclusion of other species.