The scientific name is derived from the Greek osteon [bone] and Latin spermum [seed]. It has been given several common names: African daisy, South African daisy, Cape daisy and blue-eyed daisy.
There are about 50 species, native to Africa, 35 species in southern Africa, and the southwestern Arabian Peninsula. They are half-hardy perennials or subshrubs. Therefore they do not survive outdoor wintry conditions, but there is still a wide range of hardiness.