Capeweed; Cape Dandelion
Introduced annual forb to 30cm tall. Stems succulent. Leaves mostly basal, upper leaves stem-clasping, 5-25cm long, 20-60mm wide, flat, hairy to slightly hairy above, hairy below, edges deeply dissected and toothed. Flower heads hemispherical, with 15-20 yellow 'petals' and dark brown to black centres. Flowers solitary at the tops of the stems.
Description and photo in G.M. Cunningham, WE Mulham, PL Milthorpe and J H Leigh (1981 and later printings) Plants of Western New South Wales pages 680-681
Weeds of Australia Biosecurity Queensland Edition description: http://keyserver.lucidcentral.org/weeds/data/03030800-0b07-490a-8d04-0605030c0f01/media/Html/Arctotheca_calendula.htm