Rorippa palustris (L.) Besser

Marsh Yellow-cress

Enum. Pl. 27 (1822) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Naturalised

Annual or biennial, to 60 cm high (rarely more), erect; stems often red-pigmented, glabrous. Leaves 2–12 cm long, glabrous or hairy, lobes irregularly serrate, margins toothed; basal leaves petiolate, auriculate at base, deeply incised with large terminal lamina; stem leaves similar, becoming smaller and sometimes simple. Sepals c. 1.5 mm long; petals 1–2 mm long, yellow; stamens 6. Fruit spreading to horizontal, oblong to ellipsoid, curved, 4–9 mm long (excluding style), 2–3 mm wide, contracting abruptly to style; style 0.5–1 mm long; pedicels spreading to horizontal, 4–6 mm long, glabrous or sparsely hairy; seeds in 2 rows per locule, coat covered with small bumps. Flowers mostly spring–summer.

*CVU, *DunT, *EGL, *EGU, *GipP, *Glep, *Gold, *GGr, *HNF, *HSF, *MuF, *MuM, *MSB, *NIS, *OtP, *OtR, *RobP, *SnM, *Strz, *VRiv, *VVP, *WaP, *Wim. Naturalized all States, also New Zealand. Native to much of the Northern Hemisphere. Widespread weed of wet or swampy areas.

The yellow petals about the same size as the sepals, and the short, swollen fruits are characteristic.

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: Daniel Ohlsen, 2017-06-06
Hero image
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Rosanae
order Brassicales
family Brassicaceae
genus Rorippa
Higher taxa


Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <>. Find Rorippa palustris in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Rorippa palustris in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Murray Mallee present naturalised
Wimmera present naturalised
Glenelg Plain present naturalised
Victorian Volcanic Plain present naturalised
Victorian Riverina present naturalised
Murray Scroll Belt present naturalised
Robinvale Plains present introduced
Murray Fans present naturalised
Gippsland Plain present naturalised
Otway Plain present naturalised
Warrnambool Plain present naturalised
Goldfields present naturalised
Central Victorian Uplands present naturalised
Greater Grampians present introduced
Dundas Tablelands present naturalised
Northern Inland Slopes present naturalised
East Gippsland Lowlands present naturalised
East Gippsland Uplands present naturalised
Highlands-Southern Fall present naturalised
Highlands-Northern Fall present naturalised
Otway Ranges present naturalised
Strzelecki Ranges present naturalised
Snowy Mountains present introduced

State distribution

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