Gazania rigens (syn. G. splendens), sometimes called treasure flower, is a species of flowering plant in the family Asteraceae, native to southern Africa.
It is naturalised elsewhere and is widely cultivated as an ornamental garden plant.
It is a spreading, low-growing, half-hardy perennial, growing to 50 cm (20 in) tall and wide, with blue-grey foliage and brilliant yellow, daisy-like composite flowerheads throughout the summer.
In Australia, where it is known as coastal gazania, the species has become naturalised on coastal dunes and roadsides in the Central Coast and Sydney regions of New South Wales as well as the coast of South East Queensland.
In South Australia it is found in the southern Mount Lofty area as well as on the Eyre peninsula.
More details : http://en.wikipedia.org/wiki/Gazania_rigens