Common Thornapple, Purple-flowered Thornapple
Introduced annual forb to 1.2m tall. Leaves alternating up the stems, 7-36cm long, 40-200mm wide, flat, hairless or sparsely hairy, with coarsely and irregularly toothed or lobed edges. Flowers white or pale mauve, tubular, with five lobes, solitary on short stalks arising from the bases of the leaves. Fruiting bodies hairless, with many sharp spines. Noxious weed Vic.
Description and line drawing of fruiting body (Fig. 59d) in G.M. Cunningham, WE Mulham, PL Milthorpe and J H Leigh (1981 and later printings) Plants of Western New South Wales page 586
Online fact sheet published by the South Australian Herbarium: http://www.flora.sa.gov.au/efsa/lucid/Solanaceae/Solanaceae%20species/key/Australian%20Solanaceae%20species/Media/Html/Datura_stramonium.htm