New Zealand Plant Conservation Network
  • Member login
  • Join
Facebook
  • Home
  • Flora
    • Flora species
    • Vascular
    • Non Vascular
    • Plant identification
    • Fungi
    • Make your own book
    • Quiz
  • Threats
    • Exotic Plants (Weeds)
    • Pest Animals
    • Other threats
  • Ecosystems
    • Plant communities
    • Ecosystem services
    • Novel ecosystems
  • Publications
    • Documents
    • Newsletter
    • Plant lists
    • Botanical Society journals
    • NZPCN publications
  • Conservation
    • Seedbank
    • Training
    • Restoration
    • Monitoring
    • Habitat protection
    • Funding
    • Botanic gardens
  • NZPCN
    • News
    • Trilepidea newsletter
    • Events
    • Members
    • Council members
    • Awards
    • Shop
    • Donate
    • Favourite Plant
    • Why join NZPCN?
    • Join
  • Help
    • FAQ
    • Query
    • Glossary
  • Contact us

Search flora

You are here:
  1. Home
  2. Flora
  3. Flora species
  4. Olearia crebra

Olearia crebra

Percys 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>
Hauturu Trig, Waima Ranges.<br>Photographer: Melissa Hutchison, Date taken: 19 May 2022, 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>
Hauturu Trig, Waima Ranges.<br>Photographer: Melissa Hutchison, Date taken: 19 May 2022, 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>
Hauturu Trig, Waima Ranges.<br>Photographer: Melissa Hutchison, Date taken: 19 May 2022, 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>
Mt Hauturu, Waima in November.<br>Photographer: John Smith-Dodsworth, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>.
At Mt Hauturu, Waima in November.<br>Photographer: John Smith-Dodsworth, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>.
Mt Hauturu, Waima in November.<br>Photographer: John Smith-Dodsworth, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>.
Mt Hauturu, Waima in November.<br>Photographer: John Smith-Dodsworth, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>.
Hauturu Trig, Waima Range, November.<br>Photographer: Peter J. de Lange, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>.
In cult.<br>Photographer: Tony Silbery, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>.
In cult.<br>Photographer: Tony Silbery, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>.
Cypsela. In cultivation.<br>Photographer: Jeremy R. Rolfe, Date taken: 22 April 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>
In cultivation.<br>Photographer: Jeremy R. Rolfe, Date taken: 22 April 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>
Download PDF Comment on factsheet

NZPCN members can select up to 20 plant species and automatically create a full colour, fully illustrated A4 book describing them (in PDF format).

  • Find out more...
  • Join NZPCN...
iNaturalist NZ View observations Te Papa View specimens Donate Support NZPCN

Synonyms

None

Family

Asteraceae

Authority

Olearia crebra E.K.Cameron et Heenan

Flora category

Vascular – Native

Endemic taxon

Yes

Endemic genus

No

Endemic family

No

Structural class

Trees & Shrubs - Dicotyledons

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: RR

Previous conservation statuses

2009 | Threatened – Nationally Endangered | Qualifiers: CD, RR

2004 | Threatened – Nationally Endangered

Brief description

Small tree bearing very large leathery leaves that have a rusty brown fuzzy underside inhabiting upland Waima Forest in Northland. Leaves 80-290 mm long. Flowers white with yellow centre, body 10-12 mm long. Seeds small, with a hairy tip.

Distribution

Endemic. North Island, Waima Forest, where it is known from the local high points of Hauturu, Te Raupua and Mt Misery.

Habitat

In cloud forest. Now primarily on cliff faces, although this habitat is probably not entirely natural - the cliffs are acting as refugia from goats and other browsing animals, which periodically plague the only known habitats of this species.

Features

Small tree 4-7 m tall, with upright to spreading growth form. Bark light grey, somewhat rough and peeling off in small plates. Petiole 10-20 x 2-2.45 mm. Leaves clustered in groups of 8-12 at branch apices, alternate, 80-290 x 45-120 mm, elliptic, obovate to oblanceolate, coriaceous, upper surface dark green, under sides covered in red brown appressed tomentum; lamina margin somewhat sinuate, apex obtuse; base cuneate to attenuate. Inflorescence a lateral panicle of 210-220 capitula. Capitulum 10-12 mm long. Pedicel 7-15 mm long, densely invested in short fulvous hairs. Involucre cylindrical, bracts (30-)40-54, spiraled in 7-9 rows, light brown, recurved at maturity; outer bracts 1.5-2.6 x 0.8-1.4 mm, narrowly triangular, outer surface sparsely to moderately hairy, margins fimbriate. Florets 18-26 per capitulum. Ray-florets 10-15, pistillate; corolla glabrous, tube 2.7 mm long, ligulate with deflexed white limb 3.5-8 x 1.2-1.6 mm, 2-3-lobed at apex. Disc florets 8-11, hermaphrodite, corolla glabrous, white, tube 3.3. mm long, lobes 5, 1.5 x 0.6 mm. Seeds (cypselae) 1.7-3 x 0.4-0.5 mm, narrow-cylindric, brown, 5-6-ribbed, glabrous to sparsely hairy; pappus 3.5-4.5 mm, cream, finely scabrid.

Similar taxa

None. Well marked by the small tree habit, very large leaves with red-brown undersides, and the large number of involucral bracts. This last character it shares with O. pachyphylla Cheeseman, which is otherwise a much smaller shrub, with smaller leaves and capitula which have 1-3 ray florets.

Flowering

November to January

Flower colours

White, Yellow

Fruiting

January to April

Propagation technique

Difficult except in damp cool climates. Can be grown from semi-hardwood cuttings and fresh seed. Very susceptible to phytophora and verticillium wilt, and so prone to sudden collapse in gardens located within warm or humid climates.

Threats

Severely threatened by animal browse, especially as this species is known from only four very small populations located within vulnerable ridges crests frequented by feral goats, cattle, horses and possums. Despite ongoing wild animal control, this species remains very vulnerable to even small numbers of these animals.

Etymology

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

Where To Buy

Not commericially available.

Attribution

Fact Sheet prepared for the NZPCN by P.J. de Lange 14 April (2006). Description by P.B Heenan (adapted from Heenan & Cameron 2002) 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.

Heenan, P.B. & Cameron, E.K. 2002: A new species of Olearia from Waima Forest, Northland, New Zealand. New Zealand Journal of Botany 40(4): 535-542.

Citation

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

▲ Back to top
  • Home
  • Flora
  • Threats
  • Ecosystems
  • Publications
  • Conservation
  • NZPCN
  • Help
  • Contact us

© 2022 New Zealand Plant Conservation Network • Website by RS

Coastlands Plant Nursery Wildlands

Website sponsor

  • Home
  • Flora
    • Flora species
    • Vascular
      • Ferns
        • King fern
        • True ferns
        • Adder's tongue ferns
        • Fork ferns and whisk ferns
        • Horsetails
      • Conifers
        • Celery pines
        • Kauri
        • Podocarps
          • Podocarpus
          • Dacrydium
          • Prumnopitys
          • Dacrycarpus
          • Halocarpus
          • Lepidothamnus
          • Manoao
        • Cypress
      • Flowering plants
        • Parasites
          • Leafy mistletoes
          • Pygmy mistletoes
            • Korthalsella flowers
            • Korthalsella hosts
            • Dispersal of Korthalsella
            • Associates of Korthalsella
          • Root parasites
          • Saprophytes
        • Epiphytes
          • NZ
            • Typical
            • Occasional
            • Hemi-epiphytes
            • Ephemeral
            • NZ list
        • Monocots
          • Orchids
            • Structure
          • Grasses
        • Dicots
          • Hebes
          • Kowhai
          • Coprosma
          • Beech
          • Rata
        • Carnivorous
        • Deciduous plants
        • Aquatic plants
      • Poisonous plants
        • Poisons in the garden
        • Poisonous food plants
        • Poisonous natives
      • Threatened plant lists
      • What's a vascular plant?
      • Club mosses
    • Non Vascular
      • Bryophytes
        • Liverworts
        • Mosses
        • Hornworts
      • Algae
        • Seaweeds
      • Lichens
    • Plant identification
      • Written descriptions
      • Experts
      • Plant keys
        • Key to parasitic plant genera
      • Collecting plants
        • Should I collect
        • Choosing a specimen
        • Field notes
        • Fresh plant material
        • Pressing and drying
        • Mounting specimens
        • Labelling specimens
    • Fungi
    • Make your own book
    • Quiz
  • Threats
    • Exotic Plants (Weeds)
      • Unwanted organisms
      • DOC weeds
      • Plant me instead
      • Pest Plant Accord
    • Pest Animals
      • Mammals
        • Mustelids
        • Rodents
        • Ungulates
        • Possums
      • Fish
      • Insects
    • Other threats
      • Natural events
        • Insects
      • Human induced
        • Habitat loss
        • Collection
        • Climate change
  • Ecosystems
    • Plant communities
      • Dunes
        • Volcanic
        • Coastal
          • Threats
          • Common species
          • Research on dunes
          • Pingao research
          • What you can do
      • Wetlands
        • Estuaries
          • Common estuarine species
          • Research on estuaries
        • Ephemeral
        • Restiad peat bogs
      • Forests
        • Kauri-podocarp-broadleaved
        • Podocarp broadleaved
        • Beech
      • Scrub/shrublands
        • Geothermal
          • Distribution of geothermal vegetation
          • Geothermal plants
          • Geothermal vegetation types
          • Threats to geothermal vegetation
        • Frost flat/hollow
        • Manuka fens
        • Gumlands
      • Grasslands
        • Tussock grasslands
      • Bare ground
        • Braided rivers
        • Alpine
        • Cliff
        • Scree and boulderfields
        • Shingle beaches
      • Herbfields
        • Saltpan
    • Ecosystem services
    • Novel ecosystems
  • Publications
    • Documents
    • Newsletter
    • Plant lists
      • Plant lists by region
      • National plant lists
      • How to prepare a plant list
    • Botanical Society journals
    • NZPCN publications
  • Conservation
    • Seedbank
      • Project 1 - Pohutukawa, Rata and Myrtaceae
      • Project 2 - Alpine flora and the Forget-Me-Nots
      • Project 3 - Kowhai and its relatives
      • Project 4 - Podocarps and trees of the forest
    • Training
      • Module 1: Plant life
      • Module 2: Covenants
      • Module 3: Propagation
      • Module 4: Wetlands
      • Pilot course 2006
    • Restoration
      • Gardening
        • Being weed wise
        • Garden plants
          • Trees and shrubs
          • Broad-leaved herbs
          • Grass-like herbs
          • Climbers
          • Ferns
        • Attracting wildlife
        • Planting for lizards
          • Rules
      • Species recovery
        • Plant translocations
      • Ecological restoration
        • Case studies
          • Tavora Reserve
          • Waiwhakareke
      • Revegetation
      • Eco-sourcing
      • Find a restoration group
    • Monitoring
      • Number count
        • Number count method
        • Pros and cons of number counts
        • Data analysis and interpretation
      • Presence/absence surveys
        • Presence/absence survey methods
        • Pros and cons of presence/absence surveys
        • Data analysis and interpretation
      • Mapping spatial extent
        • Spatial extent mapping methods
        • Pros and cons of spatial extent mapping
        • Data analysis and interpretation
      • Photo points
        • Photo point guidelines
    • Habitat protection
      • Legal protection
        • Nga Whenua Rahui
        • QEII covenants
        • DOC Covenants
      • Animal pest control
      • Weed control
      • Fencing
    • Funding
    • Botanic gardens
  • NZPCN
    • News
    • Trilepidea newsletter
    • Events
      • Conference 2022
        • 2022 conference postponement
        • 2022 conference field trips
        • 2022 conference workshops
        • Code of conduct
        • COVID-19 information
        • 2022 conference sponsors
        • Abstract and poster submission
        • 2022 Conference venue and accommodation
      • Conference 2019
      • Conference 2017
      • Conference 2015
        • Speakers
        • Workshops
        • Field trips
        • Charity auction
      • Conference 2013
        • Speakers
        • Timetable
    • Members
    • Council members
      • NZPCN council member profiles
      • Council 2013
      • Council 2012
      • Council 2011
      • Council 2010
      • Council 2009
      • Council 2008
      • Council 2007
      • Council 2006
      • Council 2005
      • Council 2004
      • Council 2003
    • Awards
      • NZPCN Annual Awards
        • 2019
        • 2018
        • 2017
        • 2016
        • 2015
        • 2014
        • 2013
        • 2012
        • 2011
        • 2010
        • 2009
        • 2008
        • 2007
        • 2006
        • 2005
      • David Given Scholarship
        • David Given Scholarship Recipients
    • Shop
    • Donate
    • Favourite Plant
    • Why join NZPCN?
    • Join
  • Help
    • FAQ
      • Joining the Network
      • The Network
      • Network website
      • New Zealand plants
      • The law
      • Your discoveries
    • Query
    • Glossary
  • Contact us