Nature conservation

Threatened species

Winged Peppercress - profile

Indicative distribution

   Loading map...
The areas shown in pink and/purple are the sub-regions where the species or community is known or predicted to occur. They may not occur thoughout the sub-region but may be restricted to certain areas. ( click here to see geographic restrictions). The information presented in this map is only indicative and may contain errors and omissions.
Scientific name: Lepidium monoplocoides
Conservation status in NSW: Endangered
Commonwealth status: Endangered
Profile last updated: 03 Jan 2019


Erect annual herb or perennial forb, 15-20 cm high, with angular and striped stems roughened with small warts. Leaves narrow and linear, mostly 2-7 cm long. Flowers small, borne in elongated clusters, the petals minute or absent. Fruit a 2-celled, flattened circular pod on a spreading stalk, 5 mm long and about 4 mm wide, with pointed wings extending to a narrow notch at the tip.


Widespread in the semi-arid western plains regions of NSW. Collected from widely scattered localities, with large numbers of historical records but few recent collections. There is a single collection from Broken Hill and only two collections since 1915, the most recent being 1950. Also previously recorded from Bourke, Cobar, Urana, Lake Cargelligo, Balranald, Wanganella and Deniliquin. Recorded more recently from the Hay Plain, south-eastern Riverina, and from near Pooncarie.

Habitat and ecology

  • Occurs on seasonally moist to waterlogged sites, on heavy fertile soils, with a mean annual rainfall of around 300-500 mm. Predominant vegetation is usually an open woodland dominated by Allocasuarina luehmannii (Bulloak) and/or eucalypts, particularly Eucalyptus largiflorens (Black Box) or Eucalyptus populnea (Poplar Box). The field layer of the surrounding woodland is dominated by tussock grasses.
  • Recorded in a wetland-grassland community comprising Eragrostis australasicus, Agrostis avenacea, Austrodanthonia duttoniana, Homopholis proluta, Myriophyllum crispatum, Utricularia dichotoma and Pycnosorus globosus, on waterlogged grey-brown clay. Also recorded from a Maireana pyramidata shrubland.
  • Flowers from late winter to spring, or August to October.
  • The species is highly dependent on seasonal conditions. Occurs in periodically flooded and waterlogged habitats and does not tolerate grazing disturbance.
  • The number of plants at each site varies greatly with seasonal conditions, but sites tend to be small in area with local concentrations of the plant. Has been recorded as uncommon to locally common with hundreds of plants at sites.

Regional distribution and habitat

Click on a region below to view detailed distribution, habitat and vegetation information.


Recovery strategies

Activities to assist this species

Information sources

IBRA Bioregion IBRA Subregion Known or predicted Geographic restrictions region
Brigalow Belt SouthMoonie-Barwon Interfluve Predicted None
Brigalow Belt SouthNarrandool Known None
Brigalow Belt SouthPilliga Outwash Known None
Broken Hill ComplexBarrier Range Known None
Cobar PeneplainBarnato Downs Predicted None
Cobar PeneplainBoorindal Plains Predicted None
Cobar PeneplainCanbelego Downs Known None
Cobar PeneplainLachlan Plains Known None
Cobar PeneplainNymagee Known None
Darling Riverine PlainsBogan-Macquarie Predicted None
Darling Riverine PlainsCastlereagh-Barwon Known None
Darling Riverine PlainsCulgoa-Bokhara Predicted None
Darling Riverine PlainsLouth Plains Predicted None
Darling Riverine PlainsPooncarie-Darling Predicted None
Darling Riverine PlainsWarrambool-Moonie Predicted None
Murray Darling DepressionSouth Olary Plain Known None
NSW South Western SlopesLower Slopes Known None
RiverinaLachlan Known None
RiverinaMurray Fans Known None
RiverinaMurrumbidgee Known None