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  4. Thelymitra matthewsii

Thelymitra matthewsii

Te Paki.<br>Photographer: Jeremy R. Rolfe, Date taken: 6 September 2008, 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>
Te Paki.<br>Photographer: Jeremy R. Rolfe, Date taken: 6 September 2008, 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 up of flower, Thelymitra matthewsii.<br>Photographer: Ian St George, Licence: All rights reserved.
Thelymitra matthewsii.<br>Photographer: Ian St George, Licence: All rights reserved.
One is a plant in bud with a sterile seedling alongside, commonly called a cork-screw, Te Paki.<br>Photographer: Eric Scanlen, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>.
Whole plant.<br>Photographer: Eric Scanlen, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>.
Te Paki.<br>Photographer: Jeremy R. Rolfe, Date taken: 5 September 2008, 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>
Te Paki.<br>Photographer: Jeremy R. Rolfe, Date taken: 5 September 2008, 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>
Te Paki.<br>Photographer: Jeremy R. Rolfe, Date taken: 6 September 2008, 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>
Spiral leaf and stem bract. Te Paki.<br>Photographer: Jeremy R. Rolfe, Date taken: 6 September 2008, 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>
Te Paki.<br>Photographer: Jeremy R. Rolfe, Date taken: 6 September 2008, 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>
Te Paki.<br>Photographer: Jeremy R. Rolfe, Date taken: 7 September 2008, 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>
Unusual split-flower mutation. Te Paki.<br>Photographer: Jeremy R. Rolfe, Date taken: 7 September 2008, 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>
“Hook phase” leaf. The plant does not flower when it produces a “hook” leaf. Te Paki.<br>Photographer: Jeremy R. Rolfe, Date taken: 7 September 2008, 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>
Spiral leaf.<br>Photographer: Jeremy R. Rolfe, Date taken: 5 September 2008, 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>
Spiral leaf and flower stem. Te Paki.<br>Photographer: Jeremy R. Rolfe, Date taken: 5 September 2008, 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>
“Hook phase” leaf. The plant does not flower when it produces a “hook” leaf.<br>Photographer: Jeremy R. Rolfe, Date taken: 21 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>
Te Paki.<br>Photographer: Jeremy R. Rolfe, Date taken: 7 September 2008, 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>
Te Paki.<br>Photographer: Jeremy R. Rolfe, Date taken: 7 September 2008, 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

spiral sun orchid

Synonyms

Thelymitra daltonii R.S.Rogers

Family

Orchidaceae

Authority

Thelymitra matthewsii Cheeseman

Flora category

Vascular – Native

Endemic taxon

No

Endemic genus

No

Endemic family

No

Structural class

Orchids

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 Critical | Qualifiers: EF, RR, TO

Previous conservation statuses

2009 | Threatened – Nationally Critical | Qualifiers: EF, TO, RR

2004 | Non-resident Native – Coloniser

Distribution

Indigenous. In New Zealand known only from the northern North Island where it is locally present around Te Paki. It appears to be extinct at its original New Zealand location on sandhills between Ahipara and Kaitaia. Present in Australia (South Australia and Victoria).

Habitat

Coastal to lowland (0-200 m a.s.l.) in open clay pans, on old semi-stablised but sparsely vegetated sand dunes and in open, ultramafic outwash and gullies. Also found on recently exposed soils and sand blow outs within shrubland. Requiring open sites this species soon disappears when taller plants invade its habitat.

Features

Terrestrial orchid up to 150 mm tall occurring as single plants or in small groups of up to 10 individuals. Leaves of three types; those of seedlings to juveniles 5-10 mm long, solitary, flexuous, not twisted, apex hooked; those of subadults 10-30 mm long, narrow of uniform width, spirally twisted, apex not hooked; those of mature plants 30-80 mm, broader at base, tapering, mostly linear, spirally twisted around stem, apex not hooked; sheath of adult leaves broad, finely puberulent, dark green to glaucous-green. Stem puberulent at base, terete, dark green to glaucous green. Inflorescence 1(-2)-flowered. Perianth 8-14 mm long, very dark purple-blue with darker veins. Sepals, petals and labellum alike, lanceolate to oblong-lanceolate, acute to shortly acuminate. Column short; anther exposed; connective prolonged; column arms more or less oblong, thick, fleshy; neither lobed nor ciliate, bright yellow; post anther lobe absent; small calli occasionally present across back of anther between bases of column arms. Capsule broadly ovoid 10-15 mm long.

Similar taxa

A very distinctive orchid quite unlike any other indigenous New Zealand Thelymitra J.R.Forst. et G.Forst. The spirally twisted adult leaf through which the flowering stem protrudes is unique to this species in New Zealand, while the absence of a post anther lobe is shared only with the quite unrelated T. cyanea (Lindl.) Benth., which can be immediately distinguished from T. matthewsii by its requirement for acidic wetlands, absence of a spirally twisted leaf, and ribbon-like, spirally twisted rather than erect and fleshy column arms. No other Thelymitra in New Zealand has such deep purple (almost purple-magenta) flowers as T. matthewsii.

Flowering

(July-) September (-October)

Flower colours

Blue, Violet/Purple

Fruiting

September - December

Propagation technique

Difficult. Should not be removed from the wild

Threats

Habitat loss and plant collectors have been the main cause for the decline and extinction of this species at its original New Zealand sites. It was rediscovered in the late 1980s in what are largely secure reserved sites. However, even there weeds such as Hakea spp. are a constant threat. It is also very vulnerable to trampling as it prefers open, somewhat unstable, erosion-prone soils. In Australia it is regarded as threatened (at least Vulnerable) and may be extinct in South Australia.

Etymology

thelymitra: Woman’s hat

matthewsii: After Mathews

Where To Buy

Not commercially available.

Notes on taxonomy

As of 2004 APNI list Thelymitra matthewsii as a synonym of the highly variable Australian T. spiralis (Lindl.) F.Muell. This decision is disputed by J. Jeanes (MEL) who is revising the genus. Jeans maintains that T. matthewsii is distinct from T.spiralis - NZPCN follow his advice but further research is desired.

Attribution

Description adapted from Moore and Edgar (1970).

References and further reading

Moore, L.B.; Edgar, E. 1970: Flora of New Zealand. Vol. II. Government Printer, Wellington.

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