The wild Australian Gossypium species arei subdivided into three sections. Sturtia. Hibiscoidea and Grandicalyx. The first two sections together contain five species. and include the widespread and locally abundant G. sturtianum and C. australe, respectively. Section Grandicalyx contains a further twelve species restricted to the Kimberley region or northwestern Australia and the Cobourg Peninsula in the Northern Territory. Until recently. the Grandicalyx taxa were poorly known. and phytochemical data have not previously been reported. Indeed. the phytochemistry or species belonging to sections Sturtia and Hibiscoidea is only now being investigated closely.