Sisymbrium irio L.

London Rocket

Sp. Pl. 659 (1753) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Naturalised

Annual or biennial, to 60 cm high, glabrous or with scattered curved hairs. Leaves not in basal rosette, to 16 cm long, deeply pinnately dissected with 2–6 pairs of lateral lobes, margins toothed, leaves smaller towards inflorescence, sometimes entire. Sepals 2–3 mm long; petals 2–4 mm long. Fruit spreading, linear, moniliform, curved, 2.5–7 cm long, c. 1 mm wide; style c. 0.5 mm long, with slightly swollen apex; pedicels spreading, slender, 6–10 mm long. Flowers spring.

*CVU, *GipP, *Gold, *HSF, *LoM, *MuF, *MuM, *MSB, *NIS, *OtP, *RobP, *VAlp, *VRiv, *VVP, *Wim. Naturalized all in all States. Probably native to southern Europe, northern Africa, India. Mainly a weed of the north-west but common in and around Melbourne.

Source: Entwisle, T.J. (1996). Brassicaceae. In: Walsh, N.G.; Entwisle, T.J. (eds), Flora of Victoria Vol. 3, Dicotyledons Winteraceae to Myrtaceae. Inkata Press, Melbourne.
Updated by: Val Stajsic, 2020-02-14
Hero image
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Rosanae
order Brassicales
family Brassicaceae
genus Sisymbrium
Higher taxa


Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <>. Find Sisymbrium irio in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Sisymbrium irio in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Lowan Mallee present naturalised
Murray Mallee present naturalised
Wimmera present naturalised
Victorian Volcanic Plain present naturalised
Victorian Riverina present naturalised
Murray Scroll Belt present naturalised
Robinvale Plains present naturalised
Murray Fans present naturalised
Gippsland Plain present naturalised
Otway Plain present introduced
Goldfields present naturalised
Central Victorian Uplands present naturalised
Northern Inland Slopes present naturalised
Highlands-Southern Fall present naturalised
Victorian Alps present introduced

State distribution

Distribution map
Western Australia
Northern Territory
South Australia
New South Wales
Australian Capital Territory