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  4. Carex lachenalii subsp. parkeri

Carex lachenalii subsp. parkeri

Homer tunnel, Jan.<br>Photographer: John Smith-Dodsworth, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>.
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Common name

sedge

Synonyms

Carex parkeri Petrie

Family

Cyperaceae

Authority

Carex lachenalii subsp. parkeri (Petrie) Toivonen

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.

CARLSP

Current conservation status

  • Conservation status of New Zealand indigenous vascular plants, 2017

The threat classification 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) – more information about this can be found on the NZTCS website 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. Please note, threat classifications are often suggested by authors when publications fall between NZTCS assessment periods – a suggested threat classification status has not been assessed by the NZTCS panel.

Source: NZTCS and licensed by DOC for reuse under the Creative Commons Attribution 4.0 International licence.

2017 | At Risk – Naturally Uncommon | Qualifiers: Sp

Previous conservation statuses

2012 | At Risk – Naturally Uncommon | Qualifiers: RR, Sp

2009 | At Risk – Naturally Uncommon | Qualifiers: DP

2004 | Sparse

Distribution

Endemic. South Island from Nelson to Fiordland.

Habitat

Favouring high altitude sites (> 1000 m.a.s.l.) this sedge has been collected from damp seepages within tussock grassland, from cushion bogs and on the margins of streams.

Wetland plant indicator status rating

Information derived from the revised national wetland plant list prepared to assist councils in delineating and monitoring wetlands (Clarkson et al., 2021 Manaaki Whenua – Landcare Research Contract Report LC3975 for Hawke’s Bay Regional Council). The national plant list categorises plants by the extent to which they are found in wetlands and not ‘drylands’. The indicator status ratings are OBL (obligate wetland), FACW (facultative wetland), FAC (facultative), FACU (facultative upland), and UPL (obligate upland).

OBL: Obligate Wetland

Almost always is a hydrophyte, rarely in uplands (non-wetlands).

Features

Tufted sedge arising from a deeply rooted, ascending rhizome. Culms 30-200 x 1 mm, trigonous, wiry and pliant, glabrous, sometimes scabrid above; basal sheaths cream, grey or light brown. Leaves < culms, < 2 mm wide, somewhat striated, distinctly channelled or occasionally flat, graminaceous, apices obtuse to subacute, margins faintly serrulate towards the apex. Inflorescence a single dark brown terminal head, 8-15 mm long, composed of 2-4 contiguous spikes; subtending bracts scarcely different from glumes. Spikes 5-8 mm long, with male flowers confined to the base. Glumes equal to, or slightly less than utricle length, broadly ovate, obtuse to sub-acute, dark brown with lighter brown midrib and broad, pale brown, hyaline margins. Utricles 2.5-3 x 1.5 mm, plano-convex, oblong-ovoid, indistinctly nerved, margins glabrous, contracted to a narrow, dark brown or black beak 0.5-0.6 long, this puckered below to form a broad, pale brown stipe < 0.5 mm long. Stigmas 2. Nut 1.5-1.7 mm long, light brown, oblong-obovoid to almost orbicular.

Similar taxa

Easily recognised by the very short glume-like bracts subtending the inflorescence, small red-brown spikes and the wingless, scarcely beaked utricles. It is perhaps closest to C. echinata Murray, which differs from C. lachenalii subsp. parkeri by the distant, greenish-brown, rather than red-brown, crowded spikes, and by the mature utricles which spread outwards in a stellate pattern rather than remain compact to form a narrow, terminal spike-like head.

Flowering

October - December

Fruiting

October - April

Life cycle

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

Propagation technique

Unknown

Threats

Believed to be biologically sparse and naturally uncommon. However this sedge is not often collected, and further field work into its conservation status is needed.

Etymology

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

Where To Buy

Not commercially available

Attribution

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

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