Rough Burr -daisy
Perennial forb to 45cm tall. Leaves mostly at the base of the plant, 0.5-18cm long, 7-40mm wide, flat, rough to hairy, edges lobed, toothed, or lobed and toothed. Upper stem leaves alternating up the stems, somewhat stem-clasping, 2-10mm wide, flat, rough to hairy, entire or toothed. Flower heads with 15-65 white or mauve 'petals' and yellow centres. Flowers single, or many in open groups, at the tops of the stems. Burrs hairless or hairy, with 5-6 longer spines 1-4mm long, often with several additional spines to 1mm long which are sometimes obscured by long woolly hairs.
Description and photo (page 656) and line drawing of seed (Fig. 65i page 654) in G.M. Cunningham, WE Mulham, PL Milthorpe and J H Leigh (1981 and later printings) Plants of Western New South Wales