Plants of South Eastern New South Wales

Sisymbrium irio

Flowers. Photographer Don Wood, Scotia Sanctuary, western NSW

Plant. Photographer Don Wood, Scotia Sanctuary, western NSW

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

Common name

London rocket

Family

Brassicaceae

Where found

Pastures, lawns, crops, gardens, waste ground, footpaths, and roadsides. Mainly Sydney area and round Wagga Wagga. Occasionally elsewhere.

Notes

Introduced annual or biennial herb to 1 m tall, hairless or with scattered long hairs.  Leaves alternating up the stems, flat in cross section, hairy or hairless. Lower leaves 3-25 cm long, deeply dissected, margins toothed, upper leaves smaller, sometimes entire. Flowers yellow, with 4 petals each 2–4 mm long, in clusters at the tops of the stems, which elongate as the 'pods' mature. 'Pods' 2.5–6.5 cm long, less than 1 mm wide, with swollen portions, the sides thin walled and almost translucent; stalk 6–10 mm long, slender, spreading away from the stem. Flowers spring.

PlantNET description:  http://plantnet.rbgsyd.nsw.gov.au/cgi-bin/NSWfl.pl?page=nswfl&lvl=sp&name=Sisymbrium~irio (accessed 7 February, 2021)