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  4. Olearia hectorii

Olearia hectorii

Inflorescence. in cultivation.<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>
Olearia hectori.<br>Photographer: Shannel Courtney, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>.
Olearia hectorii plant bearing Flowers.<br>Photographer: John Barkla, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by/4.0'>CC BY</a>.
Swales Bush Scenic Reserve.<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>
Seed.<br>Photographer: John Barkla, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by/4.0'>CC BY</a>.
Olearia hectori, at Round Hill.<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>
Olearia hectori.<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>
Close uop of flowers, Olearia hectori.<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>
Olearia hectori bark.<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>
Olearia hectorii seeds.<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>
Olearia hectorii, Pomahaka Valley.<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>
In cultivation.<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>
Olearia hectorii.<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>
Tree in Matukituki Valley.<br>Photographer: John Barkla, Date taken: 01/03/2005, 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>
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Common name

deciduous tree daisy, Hector’s tree daisy

Synonyms

None

Family

Asteraceae

Authority

Olearia hectorii Hook.f.

Flora category

Vascular – Native

Endemic taxon

Yes

Endemic genus

No

Endemic family

No

Structural class

Trees & Shrubs - Dicotyledons

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.

OLEHEC

Chromosome number

2n = 108

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 | Threatened – Nationally Endangered | Qualifiers: CD, De, RF

Previous conservation statuses

2009 | Threatened – Nationally Endangered | Qualifiers: CD, De, RF

2004 | Threatened – Nationally Vulnerable

Brief description

Rare small-leaved shrub with wide-angled grooved reddish stems bearing clusters of thin grey-green leaves inhabiting river valleys of the eastern South Island. Leaves 20-50mm long by 5-20mm wide. Flowers small, yellowish, on drooping 15mm long stalks, in small groups at base of leaves. Seeds fuzzy.

Distribution

Endemic. Eastern South Island.

Habitat

Lowland to subalpine often at the base of steep hills on colluvium, or on alluvium in situations affected by flooding, debris avalanching, water-logging, drought and/or frost.

Features

Deciduous shrub or small tree up to 10 m tall. Trunk up to 1 m diam., bark thick, somewhat corky, grey, persistent, deeply marked with longitudinal furrows. Branches one to many, often spreading. Branchlets slender, grooved, glabrescent; bark red, red-brown to bronze-red. Adult leaves 2-4 on short shoots or widely spaced along fast growing branchlets; petioles 5 mm, slender; leaf lamina 20-50 x 5-20 mm, grey-green to green above, silvery-grey beneath, narrow-oblong, oblong-ovate to broadly-ovate, undersides clad in silvery tomentum, upper surface glabrescent; lamina margins flat and entire. Capitula in fascicles of 2-6, 5 x 5 mm; pedicels slender, silky hairy, 15 mm long. Florets 20-25, pale yellow, ray-florets 10-15, narrow, rather short, disc florets 10-15. Phyllaries in 2 series, weakly imbricate, oblong, obtuse, exposed surface pilose hairy. Achenes 1-2 mm, narrow-obovate. Pappus-hairs 3-5 mm long.

Similar taxa

Olearia odorata Petrie and O. fragrantissima Petrie are superficially similar to O. hectorii. From those species O. hectorii can be distinguished by the leaves which are opposite and by its straight branchlets. O. fragrantissima has alternate leaves and zigzag twig stems, while O. odorata has narrower, smaller leaves lacking leaf stalks, and is usually a shrub, rarely a small tree. The North Island O. gardneri Heads, though similar differs by the broadly deltoid, truncate, rather than oblanceolate juvenile leaves, by the smaller, distinctly less hairy adult leaves, white rather than yellow flowers, and narrowly lanceolate, toothed, finely hairy phyllaries (bracts surrounding the flowers). The phyllary hairs are long and wavy.

Flowering

October - December

Flower colours

Yellow

Fruiting

December - February

Propagation technique

Can be grown from fresh seed and semi-hardwood cuttings. The strike rate of these can be variable, and best results are obtained from cuttings taken after leaf fall in autumn, and kept in a cold frame over winter

Threats

This species is seriously threatened by recruitment failure. The seed of this species requires open sites to germinate in, and in most places such sites are scarce due to the presence of introduced grasses and herbs. Very few O. hectorii populations occur on protected land, and many are now dominated by old senescent trees. This species is also susceptible to browsing animals, and because of the dynamic habitats it occupies floods and slips once so critical for this species regeneration is now a serious threat. Isolated plants produce little viable seed.

Etymology

olearia: Named after Johann Gottfried Olearius, a 17th-century German scholar, writer of hymns and author of Specimen Florae Hallensis

hectorii: Named after Sir James Hector, 19th century New Zealand geologist and botanist who was originally from Scotland

Notes

Published as hectori but hectorii is correct under the ICBN (International Code of Botanical Nomenclature).

Watch the Video

Olearia hectori - watch the TVNZ - Meet the Locals (DOC)

Attribution

Fact Sheet prepared for the NZPCN by P.J. de Lange 14 April 2006. Description by P.B Heenan (adapted from Heads (1998) and subsequently published in de Lange et al. (2010).

References and further reading

de Lange, P.J.; Heenan, P.B.; Norton, D.A.; Rolfe, J.R.; Sawyer, J.W.D. 2010: Threatened Plants of New Zealand. Canterbury University Press, Christchurch.

Heads, M. 1998. Biodiversity in the New Zealand divaricating tree daisies: Olearia sect. nov. (Compositae). Botanical Journal of the Linnean Society 127(3): 239-285.

Hooker, J.D. 1864. Handbook of the New Zealand Flora: a systematic description of the native plants of New Zealand and the Chatham, Kermadec’s, Lord Auckland’s, Campbell’s and Macquarie’s Islands.Part I ed. London, Reeve. 392 p.

NZPCN Fact Sheet citation

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

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