Annual forb. Leaves alternating up the stems, 1-3cm long, 5-20mm wide, flat, hairless to sparsely hairy. Male and female (and bisexual) flowers on the same plant. Flowers small (less than 3mm across), green, with 4 'petals', in clusters at the bases of the leaves. Lower clusters mostly female flowers, upper clusters with mixed male, female, and bisexual flowers. Vulnerable Vic.
PlantNET description with line drawings: http://plantnet.rbgsyd.nsw.gov.au/cgi-bin/NSWfl.pl?page=nswfl&lvl=sp&name=Parietaria~cardiostegia