Swamp nettle Urtica perconfusa

Key Features

  • A narrow-leaved, sparingly branched, erect or scrambling herb with stems to 2 m tall. Stems and leaves are covered with stinging hairs that inflict a painful sting. Leaves are long (3-8 cm) and narrower (up to 1 cm wide) than other nettle species, and are sharply toothed. Flowers are inconspicuous and are borne in short spikes in leaf axils.

Distribution and Habitat

  • North and South Islands in fertile lowland swamps and swampy shrubland and forest, up to 580 m in the North Island.


  • Habitat modification and loss.
  • Weed encroachment.
  • Goat and stock browse.
  • Inappropriate weed spraying.

Management Opportunities

  • Survey for new locations.
  • Mark known sites.
  • Protection of habitat.
  • Exclude browsing animals.
  • Weed control.
  • Reintroduction to appropriate wetland sites within plantation forests.

Monitoring Options

  • Check existing populations annually.
  • Report new locations to DOC, NZPCN.

Further Information and Support

  • New Zealand Plant Conservation Network (NZPCN). http://www.nzpcn.org.nz
  • Weed and pest management - Department of Conservation, Regional Councils
  • References
    • Dopson, S.R.; de Lange, P.J.; Ogle, C.C.; Rance, B.D.; Courtney, S. & Molloy, J. (1999). The conservation requirements of New Zealand’s nationally threatened vascular plants. Threatened Species Occasional Publication 13. Department of Conservation, Wellington.