Flowers. Photo: Don Wood, Scotia Sanctuary, NSW

Flowers and fruiting boides. Photo: Don Wood, Scotia Sanctuary, NSW

Flowering plants. Photo: Don Wood, Scotia Sanctuary, NSW

Flowering plant. Photo: Don Wood, Carnarvon Station Bush Heritage Reserve, via Augathella, Qld

Young plant. Photo: Zoya Alukova, California

Common Name

London Rocket

Family

Brassicaceae

Notes

Introduced annual or biennial forb to 1m tall.  Leaves basal and alternating up the stems, to 25cm long, flat, hairy or hairless, dissected and toothed.  Stem leaves sometimes with entire edges.  Flowers yellow, with 4 petals, in groups at the tops of the stems, which elongate as the fruiting bodies mature. 

Differs from Sisymbrium erysimoides in that the petals are 2.5-6mm long, and the fruiting bodies are curved, on slender stems 6-10mm long.

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 334.  Differences between species of Sisymbrium are detailed under Sisymbrium altissimum page 333.

PlantNET description:  http://plantnet.rbgsyd.nsw.gov.au/cgi-bin/NSWfl.pl?page=nswfl&lvl=sp&name=Sisymbrium~irio