Green Berry Nightshade
Sprawling annual forb to 1m diameter. Leaves alternating up the stems, 3-6cm long, 10-50mm wide, flat, sparsely sticky hairy, usually with lobed edges. Flowers white, tubular, with 5 lobes, in umbel-like groups of 2-5 flowers on stalks arising from the ends of the stems or along the stems. Berries green when mature, rarely black.
Short description in GM Cunningham, WE Mulham, PL Milthorpe and J H Leigh (1981 and later printings) Plants of Western New South Wales page 588
PlantNET description with photos: http://plantnet.rbgsyd.nsw.gov.au/cgi-bin/NSWfl.pl?page=nswfl&lvl=sp&name=Solanum~opacum
Online fact sheet with photos, published by the South Australian Herbarium: http://www.flora.sa.gov.au/efsa/lucid/Solanaceae/Solanum%20species/key/Australian%20Solanum%20species/Media/Html/Solanum_opacum.htm