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词条 Lepidium oleraceum
释义

  1. Taxonomy

  2. Distribution

  3. Conservation status

  4. Connection with James Cook

  5. Uses

  6. References

{{EngvarB|date=November 2017}}{{Use dmy dates|date=November 2017}}{{speciesbox
|status = NV
|status_system = NZTCS
|genus = Lepidium
|species = oleraceum
|authority = G.Forst. ex Sparrm.
|synonyms = *Thlaspi oleraceum Poir.
  • Nasturtium oleraceum (Poir.) Kuntze

}}Lepidium oleraceum is a herb in the Brassicaceae family, endemic to New Zealand. Its English common name is Cook's scurvy grass; Māori names include nau, ngau, naunau and heketara.[1][2]

Taxonomy

There are three recognised varieties:[3]

  • var. frondosum Kirk
  • var. acutidentatum Kirk
  • var. serrulatum Thell.

Distribution

In New Zealand it is native to coastal areas of the North and South Islands, Stewart Island, the Three Kings Islands, the Snares Islands, the Chatham Islands, the Auckland Islands, the Antipodes Islands and the Bounty Islands.[3][4]

Although this species was once widespread, it is now mostly restricted to off-shore rock stacks and islets.[6]

Conservation status

The small populations are highly threatened, one of the reasons being reduced populations of seabirds which they are dependent on to provide highly fertile and disturbed soils associated with nesting grounds. Additionally the species is susceptible to browsing by livestock, rodents, snails, and insect herbivores such as aphids, leaf miners, the diamondback moth (Plutella xylostella), and the small cabbage white butterfly (Pieris rapae).[5] It is also affected by white rust, a fungus-like disease caused by the oomycete Albugo candida.[6][5]

Connection with James Cook

During his voyages of exploration James Cook collected a number of plant species at various locations which were used to help ward off scurvy amongst his crew. While visiting Tolaga Bay in New Zealand on his first voyage, Cook noted in his journal on 27 October 1769:

"... the other place I landed at was the north point of the Bay where I got as much Sellery and Scurvy grass as loaded the Boat".[10] Historian John Cawte Beaglehole believed that "Scurvy grass" in this case referred to Lepidium oleraceum.[7] Specimens of the plant were collected by botanists Johann and Georg Forster on Cook's second voyage.

[8]

Uses

Young leaves may be eaten raw or cooked. They have a hot cress-like taste and are a rich source of vitamin C.[9]

References

1. ^{{cite web |url=http://nzflora.landcareresearch.co.nz/default.aspx?NameID=Landcareresearch.co.nz/PS1/NK/225615 |title=New Zealand Flora|accessdate=28 April 2008}}
2. ^{{cite web|title=Lepidium oleraceum. Nau. Cook's scurvy grass.|url=http://maoriplantuse.landcareresearch.co.nz/WebForms/PeoplePlantsDetails.aspx?firstcome=firstcome&PKey=C07F5A45-8273-4346-B9A1-F005092C3BEF|publisher=Landcare research|accessdate=2 April 2012}}
3. ^{{cite web |url=http://floraseries.landcareresearch.co.nz/pages/Taxon.aspx?id=_265b6c83-9bf3-41e2-af86-fe8a4c971a5f&fileName=Flora%201.xml |title=Flora of New Zealand: Taxa |accessdate=28 April 2008}}
4. ^{{cite web|url=http://www.rsnz.org/publish/nzjb/2007/006.php |title=Amey et al.—Lepidium oleraceum on Bounty Islands |accessdate=28 April 2007 |deadurl=yes |archiveurl=https://web.archive.org/web/20080706145945/http://www.rsnz.org/publish/nzjb/2007/006.php |archivedate=6 July 2008 }}
5. ^{{Cite journal |url=http://newzealandecology.org/nzje/2966 |title=White butterfly (Pieris rapae) and the white rust Albugo candida on Cook's scurvy grass (Lepidium oleraceum) |last1=Hasenbank |first1=M. |last2=Brandon |first2=M. |last3=Hartley |first3=S. |year=2011 |journal=New Zealand Journal of Ecology |volume=35 |pages=69–75 |access-date=7 June 2016 }}
6. ^{{cite web|title=Conservation genetics of threatened plants|url=http://www.landcareresearch.co.nz/research/biocons/genetics/projects/plant_conservation.asp |publisher=Landcare Research|accessdate=29 April 2008}}
7. ^{{cite journal|last=Lange |first=P.J. |author2=D.A. Norton |year=1996 |title=To what New Zealand plant does the vernacular 'scurvy grass' refer? |journal=New Zealand Journal of Botany |volume=34 |issue= 3|pages=417–420 |url=http://www.rsnz.org/publish/nzjb/1996/152.pdf |accessdate=29 April 2008 |doi=10.1080/0028825x.1996.10410705 |deadurl=yes |archiveurl=https://web.archive.org/web/20080830092407/http://www.rsnz.org/publish/nzjb/1996/152.pdf |archivedate=30 August 2008 }}
8. ^{{cite web|title=Lepidium oleraceum |url=http://herba.msu.ru/pictures/mw_type/dicot/brassicac/00000113.html|work=Type collection of Lomonosov Moscow State University (MW)|accessdate=29 April 2008}}
9. ^{{cite web |url=http://www.pfaf.org/database/plants.php?Lepidium+oleraceum |title=Lepidium oleraceum – Plants for a Future database report |accessdate=28 April 2008}}
{{Taxonbar|from=Q4118528}}

9 : Lepidium|Flora of the North Island|Flora of the South Island|Flora of the Chatham Islands|Flora of the Antipodes Islands|Leaf vegetables|Flora of the Auckland Islands|Endangered flora of New Zealand|Plants described in 1786

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