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  4. Helichrysum dimorphum

Helichrysum dimorphum

Cave Stream, Castle Hill (planted).<br>Photographer: Melissa Hutchison, Date taken: 22/02/2020, 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>
Cave Stream, Castle Hill (planted).<br>Photographer: Melissa Hutchison, Date taken: 22/02/2020, 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>
At Poulter Bridge (November).<br>Photographer: John Smith-Dodsworth, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>.
Cave Stream.<br>Photographer: Melissa Hutchison, 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>
Cave Stream.<br>Photographer: Melissa Hutchison, 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>
Cave Stream, Castle Hill (planted).<br>Photographer: Melissa Hutchison, Date taken: 17/10/2009, 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>
Cave Stream, Castle Hill (planted).<br>Photographer: Melissa Hutchison, Date taken: 17/10/2009, 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>
Growing through matagouri, Cave Stream, Castle Hill (planted).<br>Photographer: Melissa Hutchison, Date taken: 17/10/2009, 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>
Growing through matagouri, Cave Stream, Castle Hill (planted).<br>Photographer: Melissa Hutchison, Date taken: 22/02/2020, 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>
Growing through matagouri, Cave Stream, Castle Hill (planted).<br>Photographer: Melissa Hutchison, Date taken: 17/10/2009, 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>
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Common names

everlasting daisy

Biostatus

Native – Endemic taxon

Category

Vascular

Structural class

Lianes & Related Trailing Plants - Dicotyledons

Simplified description

Rare climbing shrub with untidy brownish twigs inhabiting dry inland Canterbury. Leaves of two types: small (5 mm) and narrow with a white underside on the base of twigs, and scale-like and embedded in fuzzy stem towards the tip of twigs. Flowers small, dry, at tips of twigs.

Detailed description

Weakly lianoid, sparingly branched scrambler, producing numerous fine stems up to 8 m long. Juvenile and shade leaves 5 × 2 mm, brown or grey-black, spreading, ovate-oblong, apex subacute and mucronate, upper leaf surface glabrous, under surface covered in white wispy hairs. Leaves of terminal branches or exposed branches overlapping, scale -like, appressed, 3 × 1 mm, linear-lanceolate, strongly keeled, tomentose, base clad in dense, floccose tomentum. Capitula subcylindric, terminal, 3.5 mm diameter, phyllaries (bracts) in 2–3 series, outer bracts oblong, inner narrow-oblong, margins finely toothed. Florets 15–25. Achenes (seeds) narrow-oblong, glabrous, pappus hairs slender and numerous.

Similar taxa

None

Distribution

Endemic. New Zealand: South Island. Presently known only from the Poulter, Esk and Puffer catchments where they drain into the Waimakariri River (but there is also an old record from Piano Flat, Southland).

Habitat

A species of lowland to montane situations. Usually found on river terraces and alongside river gorges. Always in grey scrub, where it is primarily associated with matagouri (Discaria toumatou Raoul) shrubs.

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 | Threatened – Nationally Endangered | Qualifiers: Sp, DPT

Jump to previous conservation statuses

Threats

Seriously threatened by aerial spraying for gorse (Ulex europaeus L.), and by scrub fires. This species often grows within and through matagouri (Discaria toumatou) so it is easily overlooked. Matagouri is easily burned and considered to be a pest in some parts of the country. Clearance of matagouri may have been a factor in the historic decline of Helichrysum dimorphum, and remains a serious potential threat to this day.

Detailed taxonomy

Family

Asteraceae

Authority

Helichrysum dimorphum Cockayne

Synonyms

None

Endemic taxon

Yes

Endemic genus

No

Endemic family

No

Ecology

Flowering

September–February

Fruiting

October–March

Life cycle and dispersal

Pappate achenes are dispersed by wind (Thorsen et al., 2009).

Propagation technique

Easily grown from fresh seed and semi-hardwood cuttings. Established plants layer easily. Does best in semi-shade or planted at the base of a shrub through which it can sprawl. Does not like humid climates.

Other information

Where To Buy

Occasionally sold in garden centres.

Etymology

helichrysum: From the Greek words helios ‘sun’ and chrysos ‘gold’, referring to the colour of the flowers of some species

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.

HELDIM

Chromosome number

2n = 28

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 | Threatened – Nationally Endangered | Qualifiers: Sp

2012 | Threatened – Nationally Vulnerable | Qualifiers: Sp

2009 | At Risk – Declining | Qualifiers: Sp

2004 | Threatened – Nationally Endangered

Jump to current conservation status

Referencing and citations

References and further reading

Allan HH. 1961. Flora of New Zealand, Volume I. Indigenous Tracheophyta: Psilopsida, Lycopsida, Filicopsida, Gymnospermae, Dicotyledones. Government Printer, Wellington, NZ. 1085 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. https://doi.org/10.1016/j.ppees.2009.06.001.

Attribution

Fact Sheet prepared for NZPCN by P.J. de Lange 2 October 2003. Description modified from Allan (1961).

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.

NZPCN Fact Sheet citation

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

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