Corrugated Sida, Variable Sida
Perennial forb, prostrate to sprawling. Leaves alternating along the stems, 1-3cm long, 7-12mm wide or more, flat, almost hairless above, hairy below, toothed. Flowers yellow, with 5 petals, 1-2 on stems arising from the bases of the leaves, sometimes apparently in racemes at the ends 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 487
PlantNET description: http://plantnet.rbgsyd.nsw.gov.au/cgi-bin/NSWfl.pl?page=nswfl&lvl=sp&name=Sida~corrugata