Taxonomy of Olearia stuartii (Asteraceae : Astereae) and allied species

Western Australian specimens hitherto considered as Olearia stuartii (F. Muell.) F. Muell. ex Benth. are segregated into three distinct species. One of these is described as new, namely O. humilis Lander. Another represents O. xerophila (F. Muell.) F. Muell. ex Benth., previously known only from Queensland. O. stuartii is recognised as being a species widespread in inland Australia. A related species, O. gordonii Lander, is described from southern Queensland. These taxa all fall within Olearia sect Merismotriche Benth. within which they form a natural group.