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  4. Ranunculus scrithalis

Ranunculus scrithalis

Ranunculus scithalis in flower, Eyre Mountains.<br>Photographer: John Barkla, Date taken: 17/11/2014, 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>
Ranunculus scrithalis, Eyre Mountains.<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>
Eyre Mts – Bowels of the Earth at approximately 1600m.<br>Photographer: Sue Lake, Date taken: 16/01/2013, 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>
Eyre Mts – Bowels of the Earth at approximately 1600m.<br>Photographer: Sue Lake, Date taken: 16/01/2013, 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>
Eyre Mts – Bowels of the Earth at approximately 1600m.<br>Photographer: Sue Lake, Date taken: 16/01/2013, 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>
Eyre Mts – Bowels of the Earth at approximately 1600m.<br>Photographer: Sue Lake, Date taken: 16/01/2013, 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>
Eyre Mts – Bowels of the Earth at approximately 1600m.<br>Photographer: Sue Lake, Date taken: 16/01/2013, 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>
Ranunculus scrithalis with opening flower, Eyre Mountains.<br>Photographer: John Barkla, Date taken: 17/11/2014, 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>
Ranunculus scrithalis showing rhizome, Eyre Mountains.<br>Photographer: John Barkla, Date taken: 17/11/2014, 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>
Ranunculus scrithalis showing rhizome, Eyre Mountains.<br>Photographer: John Barkla, Date taken: 17/11/2014, 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>
Ranunculus scrithalis in flower, Eyre Mountains.<br>Photographer: John Barkla, Date taken: 17/11/2014, 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

Eyre Mountains buttercup

Synonyms

None (first described in 1987)

Family

Ranunculaceae

Authority

Ranunculus scrithalis Garn.-Jones

Flora category

Vascular – Native

Endemic taxon

Yes

Endemic genus

No

Endemic family

No

Structural class

Herbs - Dicotyledons other than Composites

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, Sp

Previous conservation statuses

2009 | At Risk – Naturally Uncommon | Qualifiers: DP

2004 | Range Restricted

Distribution

Endemic. South Island, Eyre Mountains.

Habitat

Alpine (1100-1900 m a.s.l.). Growing in fine, moist clay underlying shingle slides and within stable scree.

Features

Stout perennial forming small, solitary tufts up to 200 mm tall; rhizome stout, fleshy ascending to trailing (well buried within fine clay and shingle). Leaves usually partially buried in shignle often with just the tips protruding, 30-150 mm long, broadly ovate, dark glaucous-grey to glaucous green, with tips tinged red, broadly ovate, deeply 2-3-terantisect, lamina covered with fine silky hairs; ultimate lobes linear, subacute. Scapes 1-flowered, erect, thickly invested in fine silky hairs. Fliowers 20-30 mm diameter. Sepals spreading, narrowly ovate, finely covered with silky hairs. Petals 12-15, up to 15 mm long, lemon yellow, linear-oblong, nectary solitary, c.6 mm from petal base, annular. Receptacle glabrous. Achenes numerous, turgid, sparsely silky hairy; body 2-2.5 mm long, beak 3-3.5 mm long.

Similar taxa

Somewhat similar to R. haastii Hook.f. and R. buchananii Hook.f. From R. buchananii it differs by its yellow rather than white flowers, glabrous receptacle, and by the middle leaf segment which is sessile rather than stipitate. Ecologically both species also differ. R. buchananii favours stable debris slopes, rock ledges and crevices kept damp by meltwater, and in close proximity to permanent snow and ice fields. R. scrithalis grows in fine, damp clay partially buried within scree and shingle slides. From R. haastii, R. scrithalis differs by its allopatric distribution, silky hairy leaves, hairy rather than glabrescent or glabrous achenes, and subacute to rounded rather than truncate to retuse petals

Flowering

December - January

Flower colours

Yellow

Fruiting

February - April

Propagation technique

Difficult. Should not be removed from the wild

Threats

Apparently very local in its distribution. Probably threatened by browsing animals. This species may be more threatened than is currently believed.

Etymology

ranunculus: From the Latin ‘rana’ frog, meaning little frog and probably refers to the plants typical marshy habit where frogs abound

Where To Buy

Not commercially available

Attribution

Fact sheet prepared by P.J. de Lange for NZPCN (1 June 2013)

NZPCN Fact Sheet citation

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

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