Annual forb to 25cm tall. Leaves alternating up the stems, linear to flat, 0.8-2.5cm long, 1-2.5mm wide, upper surface sparsely hairy, lower surface woolly, margins curved down, tips pointed. Flowers yellow, with 0 petals. Flower heads cup-shaped, borne singly at the ends of the stems.
Differs from Leptorhynchos baileyi in that there are 4 bristles on the seeds, with tiny hairs along the bristles. This is easiest seen with a low power microscope.
Description (page 704) and photo (page 705) in G.M. Cunningham, WE Mulham, PL Milthorpe and J H Leigh (1981 and later printings) Plants of Western New South Wales
PlantNET description with line drawings: http://plantnet.rbgsyd.nsw.gov.au/cgi-bin/NSWfl.pl?page=nswfl&lvl=sp&name=Leptorhynchos~tetrachaetus