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  4. Haloragis erecta subsp. cartilaginea

Haloragis erecta subsp. cartilaginea

Surville Cliffs.<br>Photographer: Jeremy R. Rolfe, Date taken: 8 November 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>
Surville Cliffs.<br>Photographer: Jeremy R. Rolfe, Date taken: 19 October 2009, 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>
Surville Cliffs.<br>Photographer: Jeremy R. Rolfe, Date taken: 22 February 2011, 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>
Surville Cliffs.<br>Photographer: Jeremy R. Rolfe, Date taken: 19 October 2009, 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>
Surville Cliffs.<br>Photographer: Peter J. de Lange, Date taken: 20 October 2009, 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>
Surville Cliffs, in shade.<br>Photographer: Peter J. de Lange, Date taken: 20 October 2009, 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>
Flowers. Surville Cliffs.<br>Photographer: Jeremy R. Rolfe, Date taken: 17 November 2010, 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>
Flowers. Surville Cliffs.<br>Photographer: Jeremy R. Rolfe, Date taken: 17 November 2010, 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>
Surville Cliffs.<br>Photographer: Gillian M. Crowcroft, 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

Surville Cliffs haloragis

Synonyms

Haloragis cartilaginea Cheeseman

Family

Haloragaceae

Authority

Haloragis erecta subsp. cartilaginea (Cheeseman) Orchard

Flora category

Vascular – Native

Endemic taxon

Yes

Endemic genus

No

Endemic family

No

Structural class

Herbs - Dicotyledons other than Composites

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.

HALESC

Chromosome number

2n = 14

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.

2012 | At Risk – Naturally Uncommon | Qualifiers: OL

Previous conservation statuses

2009 | At Risk – Naturally Uncommon | Qualifiers: CD, ST, OL

2004 | Range Restricted

Distribution

Endemic. North Island only, where it is supposedly confined to the 120 ha exposure of serpentinised peridotite rocks at the Surville Cliffs, North Cape. However similar plants have been found elsewhere in Te Paki, and in 2011 this subspecies was found growing on peridotite and gabbro east of the North Cape serpentinized zone

Habitat

Abundant on open serpentinite scree, as gully heads, on cliff faces and on bare clay pans. Dislikes competition. This is one of the few Surville Cliff ultramafic endemics to have recolonised the former workings of the serpentinite quarry.

Features

Decumbent, perennial herb forming sprawling patches up to 300 x 150 mm; stems numerous, tetragonous, usually dark maroon or purple-black, minutely pubescent, with larger hairs on the angles. Leaves opposite, rather closely spaced, broadly ovate to ovate-oblong, dark brownish-green to orange-green, coriaceous, minutely and harshly scabrid, blade 14-20 × 10-13 mm, petiole very short and pubescent, margins regularly shallowly serrate. Inflorescences, many-flowered racemes terminating branches, leafy bracts subtending clusters of flowers and bracteoles. Flower c.3.5 mm long, on short pubescent pedicel; sepals pubescent, triangular, exceeding ovary length and reaching halfway up petals; petals c.3× ovary length, minutely scabrid on keel; stamens 8, anthers as long as petals, filaments very short; ovary 4-lobed, styles 4, short, erect, stigma covered with short lax multicellular hairs. Fruit c.3.5 mm. long (including calyx-lobes) subpyriform, smooth and cylindrical above, below swollen into 4 rounded lobes, rugose, rarely and then usually only slightly winged; pericarp woody, loculi 4, 1-seeded.

Similar taxa

None. Haloragis erecta (Murray) Oken subsp. erecta differs by its mostly erect rather than decumbent growth habit and lanceolate to elliptic or oblong-elliptic leaves. However, some forms of H. erecta subsp. erecta (especially those found along the South Wellington Coast) approach subsp. cartilaginea, differing only by their narrower, less harshly scabrid leaves.

Flowering

Throughout the year

Fruiting

Throughout the year

Propagation technique

Easily grown from cuttings and fresh seed. Forms a small creeping to semi-erect shrub. Ideal for exposed dry soils. Does best if the soil is enriched with a magnesium fertiliser but this is not necessary.

Threats

A locally common range restricted endemic listed only because of the small geographic area it occupies.

Etymology

haloragis: Salt grapes

erecta: Erect

cartilaginea: Like cartilage

Where To Buy

Not commercially available

Taxonomic Notes

In cultivation, over time plants become more lax and the leaves less harsh textured.

Haloragis erecta subsp. cartilaginea

Attribution

Fact sheet prepared for NZPCN by P.J. de Lange (3 November 2005). Description based on Webb et al. (1988) and observations made from fresh material and herbarium specimens.

References and further reading

Webb, C. J.; Sykes, W. R.; Garnock-Jones, P. J. 1988: Flora of New Zealand. Vol. IV. Naturalised Pteridophytes, Gymnosperms, Dicotyledons. Christchurch, New Zealand, Botany Division, D.S.I.R.

Citation

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

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