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  4. Carex carsei

Carex carsei

At the 1000 Acre Plateau, Northwest Nelson.<br>Photographer: Mike Thorsen, Licence: All rights reserved. <a class='member-message' href='/nzpcn/why-join-nzpcn/' target='_blank'>Members can view a larger version of this image.</a>
Photographer: Shannel Courtney, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>.
Photographer: Cathy Jones, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by/4.0'>CC BY</a>.
Photographer: Cathy Jones, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by/4.0'>CC BY</a>.
In cultivation.<br>Photographer: Jeremy R. Rolfe, Date taken: 29/10/2007, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by/4.0'>CC BY</a>. <a class='member-message' href='/nzpcn/why-join-nzpcn/' target='_blank'>Members can view a larger version of this image.</a>
In cultivation.<br>Photographer: Jeremy R. Rolfe, Date taken: 29/10/2007, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by/4.0'>CC BY</a>. <a class='member-message' href='/nzpcn/why-join-nzpcn/' target='_blank'>Members can view a larger version of this image.</a>
Carex carsei.<br>Photographer: John Barkla, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by/4.0'>CC BY</a>. <a class='member-message' href='/nzpcn/why-join-nzpcn/' target='_blank'>Members can view a larger version of this image.</a>
1000 Acre Plateau, Northwest Nelson.<br>Photographer: Mike Thorsen, Licence: All rights reserved. <a class='member-message' href='/nzpcn/why-join-nzpcn/' target='_blank'>Members can view a larger version of this image.</a>
1000 Acre Plateau, Northwest Nelson.<br>Photographer: Mike Thorsen, Licence: All rights reserved. <a class='member-message' href='/nzpcn/why-join-nzpcn/' target='_blank'>Members can view a larger version of this image.</a>
1000 Acre Plateau, Kahurangi N.P.<br>Photographer: Mike Thorsen, Licence: All rights reserved. <a class='member-message' href='/nzpcn/why-join-nzpcn/' target='_blank'>Members can view a larger version of this image.</a>
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Common name

Carse’s sedge

Synonyms

None

Family

Cyperaceae

Authority

Carex carsei Petrie

Flora category

Vascular – Native

Endemic taxon

Yes

Endemic genus

No

Endemic family

No

Structural class

Sedges

NVS code

The National Vegetation Survey (NVS) Databank is a physical archive and electronic databank containing records of over 94,000 vegetation survey plots - including data from over 19,000 permanent plots. NVS maintains a standard set of species code abbreviations that correspond to standard scientific plant names from the Ngä Tipu o Aotearoa - New Zealand Plants database.

CRXCAR

Chromosome number

2n = 36

Current conservation status

  • Conservation status of New Zealand indigenous vascular plants, 2017

The conservation status of all known New Zealand vascular plant taxa at the rank of species and below were reassessed in 2017 using the New Zealand Threat Classification System (NZTCS). This report includes a statistical summary and brief notes on changes since 2012 and replaces all previous NZTCS lists for vascular plants. Authors: By Peter J. de Lange, Jeremy R. Rolfe, John W. Barkla, Shannel P. Courtney, Paul D. Champion, Leon R. Perrie, Sarah M. Beadel, Kerry A. Ford, Ilse Breitwieser, Ines Schönberger, Rowan Hindmarsh-Walls, Peter B. Heenan and Kate Ladley.

2018 | At Risk – Declining

Previous conservation statuses

2012 | At Risk – Naturally Uncommon | Qualifiers: DP

2009 | At Risk – Declining | Qualifiers: DP

2004 | Data Deficient

Distribution

Endemic. In the North Island known from near Lake Taupo, and wetlands around Tongariro National Park. In the South Island throughout in suitable habitats, though scarce in Canterbury, Otago and Fiordland.

Habitat

An sub alpine to alpine sedge of boggy ground, mires, and wet forest clearings.

Features

Rhizomatous sedge, forming dense, grassy swards in swampy places. Rhizomes 1 mm diameter, light brown or grey. Culms 2.5-89.5(-25) cm × 0.5-1 mm, 3-angled (trigonous) or compressed below, stiff, erect, hairless, enclosed for much of length by grey or cream leaf-sheaths. Leaves culms, 1-2.5 mm wide, channelled, grass-like, yellow-green, linear, narrowed to a subobtuse tip, margins finely scabrid (toothed). Inflorescence of 3-5 spikes, clustered together in a compact head, terminal spike male, small, unstalked, remaining spikes female, stalked, overtopping male 1-1.5 cm long. Glumes much < than utricles, broadly ovate, acute, membraneous, faintly multi-nerved, pale yellow-brown with a green midrib. Utricles 7-8.5 × 2 mm, plano(flat)-convex to subtrigonous, narrowly lanceolate, multi-nerved, light green to greenish-brown, hairless, tapering to a 3-3.5 mm long beak. Beak bifid, with a finely scabrid orifice. Stigmas 3. Nut 2 mm long, obtusely 3-angled, obovoid, glossy, light yellow-green.

Similar taxa

Carex carsei is a very distinctive species unlikely to confused with any other indigenous or naturalised sedge.

Flowering

No information available

Fruiting

No information available

Propagation technique

Easily grown by division and from fresh seed.

Threats

Carex carsei has very few recent (>1980) collections

Etymology

carex: Latin name for a species of sedge, now applied to the whole group.

Attribution

Fact Sheet prepared by P.J. de Lange (10 August 2006). Description adapted from Moore and Edgar (1970)

References and further reading

Moore, L.B.; Edgar, E. 1970: Flora of New Zealand. Vol. II. Government Printer, Wellington.

Thorsen, M. J.; Dickinson, K. J. M.; Seddon, P. J. 2009. Seed dispersal systems in the New Zealand flora. Perspectives in Plant Ecology, Evolution and Systematics 2009 Vol. 11 No. 4 pp. 285-309

NZPCN Fact Sheet citation

Please cite as: de Lange, P.J. (Year at time of access): Carex carsei Fact Sheet (content continuously updated). New Zealand Plant Conservation Network. https://www.nzpcn.org.nz/flora/species/carex-carsei/ (Date website was queried)

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