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  4. Carex devia

Carex devia

Asbestos Quarry, Takaka Valley, Kahurangi National Park.<br>Photographer: Simon Walls, Date taken: 29/01/2014, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>. <a class='member-message' href='/nzpcn/why-join-nzpcn/' target='_blank'>Members can view a larger version of this image.</a>
Carex devia utricles. From herbarium specimen: AK 232680. Photographed with permission of Auckland Institute and Museum.<br>Photographer: Jeremy R. Rolfe, Date taken: 01/02/2008, 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>
Herbarium specimen: AK 232680. Photographed with permission of Auckland Institute and Museum.<br>Photographer: Jeremy R. Rolfe, Date taken: 23/10/2007, 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>
Herbarium specimen: AK 232680. Photographed with permission of Auckland Institute and Museum.<br>Photographer: Jeremy R. Rolfe, Date taken: 23/10/2007, 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>
Cobb V.<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>
Carex devia.<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>
Ex Hackett.<br>Photographer: Mike Thorsen, Date taken: 04/11/2013, 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>
Inflorescence with shield bug, Asbestos Quarry, Takaka Valley, Kahurangi National Park.<br>Photographer: Simon Walls, Date taken: 29/01/2014, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>. <a class='member-message' href='/nzpcn/why-join-nzpcn/' target='_blank'>Members can view a larger version of this image.</a>
Asbestos Quarry, Takaka Valley, Kahurangi National Park.<br>Photographer: Simon Walls, Date taken: 02/04/2012, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>. <a class='member-message' href='/nzpcn/why-join-nzpcn/' target='_blank'>Members can view a larger version of this image.</a>
Red Hills, Richmond Ranges.<br>Photographer: Melissa Hutchison, Date taken: 08/01/2023, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>. <a class='member-message' href='/nzpcn/why-join-nzpcn/' target='_blank'>Members can view a larger version of this image.</a>
Red Hills, Richmond Ranges.<br>Photographer: Melissa Hutchison, Date taken: 08/01/2023, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>. <a class='member-message' href='/nzpcn/why-join-nzpcn/' target='_blank'>Members can view a larger version of this image.</a>
Red Hills, Richmond Ranges.<br>Photographer: Melissa Hutchison, Date taken: 08/01/2023, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>. <a class='member-message' href='/nzpcn/why-join-nzpcn/' target='_blank'>Members can view a larger version of this image.</a>
Red Hills, Richmond Ranges.<br>Photographer: Melissa Hutchison, Date taken: 08/01/2023, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>. <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 names

an ultramafic sedge

Biostatus

Native – Endemic taxon

Category

Vascular

Structural class

Sedges

Detailed description

Rather loosely caespitose, reddish green to yellow-green sedge of ultramafic shrubland, tussock grassland, scree, pavement and boulder field. Culms 70–750–(900) × 1 mm, usually much > leaves, subtrigonous, glabrous or finely scabrid; basal sheaths brown, dark brown, to almost charcoal black, occasionally red-tinged. Leaves 70–300 × 1.5–2.5 mm, usually crowded at base of culm, channeled, often involute, rather stiff, margins scabrid. Spikes 2–4, ± distant, sessile usually with the lower 1–2 shortly pedunculate; terminal 1–2 spikes male, these 1.5–3 mm diameter, typically clavate, rarely with a few female flowers near the base, female spikes 1–30 × 5 mm. Glumes (excluding awn) just < utricles in length, ovate, acute, sometimes emarginated, coriaceous, red-purple or red-brown with a green midrib prolonged to a hispid awn or varying length. Utricles 3 × 1.5 mm, unequal, biconvex to plano-convex, ellipsoid, light brown at base, darker brown above, distinctly nerved, abruptly narrowed to a 0.2–0.5 mm beak, this deeply cleft with divergent teeth, crura scabrid, utricle other glabrous, stipe 0.5 mm. Stigmas 2. Nut 1.8–1.9 mm, biconvex, oblong.

Similar taxa

The ultramafic sister species of Carex flagellifera Colenso, from which it differs by the rather leathery reddish-green rather softer, yellow-green to green leaves, close-set rather than distant, shorter, broader female spikes, clavate rather than gracile linear terminal male spikes, and distinctly rather than faintly nerved completely red-purple or red-brown rather than bicoloured (light brown basally dark brown terminally) utricles. In some situations the fruiting culms may elongate up to 2 m from the parent plant. The two species have distinctly different chromosome numbers, 2n = c.58 in C. flagellifera, 2n = c.70-72 in C. devia.

Distribution

Endemic. South Island, Nelson where confined to ultramafic rocks (Mt Dun, Red Hills and Upper Takaka River (Asbestos Hut area).

Habitat

A common species of open ultramafic scree, boulder field, tussock grassland and under low lying scrub. Also common on old mine workings in the upper Takaka and at Dun Mountain.

Current conservation status

The conservation status of all known New Zealand vascular plant taxa at the rank of species and below were reassessed in 2022-2023 using the New Zealand Threat Classification System (NZTCS) – more information about this can be found on the NZTCS website. This report includes replaces all previous NZTCS lists for vascular plants. Previous assessments can be found here.

  • Conservation status of vascular plants in Aotearoa New Zealand, 2023. 2024. Peter J. de Lange, Jane Gosden, Shannel P. Courtney, Alexander J. Fergus, John W. Barkla, Sarah M. Beadel, Paul D. Champion, Rowan Hindmarsh-Walls, Troy Makan and Pascale Michel Department of Conservation. Source: NZTCS and licensed by DOC for reuse under the Creative Commons Attribution 4.0 International licence.

2023 | At Risk – Naturally Uncommon | Qualifiers: RR

Jump to previous conservation statuses

Threats

A local, range-restricted endemic, abundant within the ultramafic communities it favours.

Detailed taxonomy

Family

Cyperaceae

Authority

Carex devia Cheeseman

Synonyms

None

Endemic taxon

Yes

Endemic genus

No

Endemic family

No

Ecology

Flowering

September–December

Fruiting

September–June

Life cycle and dispersal

Nuts surrounded by inflated utricles are dispersed by granivory and wind (Thorsen et al., 2009).

Propagation technique

Although this is an ultramafic endemic, it is easily grown in most soils and situations. Favouring free draining sites and full sun it is an attractive alternative to the more commonly cultivated Carex flagellifera Colenso and C. testacea Sol. ex Boott in Hook.f. Can be propagated by division of whole plants and/or by sowing fresh seed.

Other information

Where To Buy

Not commercially available

Etymology

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

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.

CARDEV

Chromosome number

2n = c.70-72

Previous conservation statuses

The conservation status of all known New Zealand vascular plant taxa at the rank of species and below were reassessed in 2022-2023 using the New Zealand Threat Classification System (NZTCS) – more information about this can be found on the NZTCS website. This report includes replaces all previous NZTCS lists for vascular plants. Previous assessments can be found here.

  • Conservation status of vascular plants in Aotearoa New Zealand, 2023. 2024. Peter J. de Lange, Jane Gosden, Shannel P. Courtney, Alexander J. Fergus, John W. Barkla, Sarah M. Beadel, Paul D. Champion, Rowan Hindmarsh-Walls, Troy Makan and Pascale Michel Department of Conservation. Source: NZTCS and licensed by DOC for reuse under the Creative Commons Attribution 4.0 International licence.

2017 | At Risk – Naturally Uncommon | Qualifiers: RR

2012 | At Risk – Naturally Uncommon | Qualifiers: RR

2009 | At Risk – Naturally Uncommon

2004 | Range Restricted

Jump to current conservation status

Referencing and citations

References and further reading

Moore LB, Edgar E. 1970. Flora of New Zealand, Volume II. Indigenous Tracheophyta: Monocotyledones except Gramineae. Government Printer, Wellington, NZ. 354 p.

Thorsen MJ, Dickinson KJM, Seddon PJ. 2009. Seed dispersal systems in the New Zealand flora. Perspectives in Plant Ecology, Evolution and Systematics 11: 285–309.

Attribution

Description adapted from Moore and Edgar (1970)

Some of this factsheet information is derived from Flora of New Zealand Online and is used under a Creative Commons Attribution 3.0 New Zealand licence.

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