Smooth Nettle, Native Pellitory, Shade Pellitory, Forest Pellitory, Soft Nettle
Annual forb. Leaves alternating up the stems, 1-3.5cm long, 5-20mm wide, flat, more or less hairy. Male and female (and bisexual) flowers on the same plant. Flowers small (less than 3mm across), green, with 4 'petals', in paired clusters (occasionally single clusters) of 3 flowers, at the bases of the leaves.
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 page 210