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  4. Caladenia alata

Caladenia alata

Piwhane / Spirits Bay.<br>Photographer: Jeremy R. Rolfe, Date taken: 06/09/2008, 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>
Lake Ohia.<br>Photographer: Jeremy R. Rolfe, Date taken: 05/09/2008, 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>
Lake Ohia.<br>Photographer: Jeremy R. Rolfe, Date taken: 05/09/2008, 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>
Lake Ohia.<br>Photographer: Jeremy R. Rolfe, Date taken: 05/09/2008, 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>
Piwhane / Spirits Bay.<br>Photographer: Jeremy R. Rolfe, Date taken: 06/09/2008, 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, Petalochilus alata.<br>Photographer: Ian St George, Licence: All rights reserved.
Te Paki.<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: Eric Scanlen, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>.
Petalochilus alatus at Whangaroa.<br>Photographer: Bill Campbell, Date taken: 08/10/2007, 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>
Petalochilus alatus.<br>Photographer: Kevin Matthews, 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>
Earth Wall Track, Te Paki.<br>Photographer: Bill Campbell, Date taken: 08/10/2016, 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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Synonyms

Caladenia catenata var. exigua (Cheeseman) W.M. Curtis; Caladenia minor var. exigua Cheeseman; Caladenia exigua Cheeseman; Caladenia holmesii Rupp; Caladenia carnea var. alata (R.Br.) Domin.; Caladenia carnea var. exigua (Cheeseman) Rupp; Petalochilus alatus (R.Br.) D.L.Jones et M.A. Clem.

Family

Orchidaceae

Authority

Caladenia alata R.Br.

Flora category

Vascular – Native

Endemic taxon

Yes

Endemic genus

No

Endemic family

No

Structural class

Orchids

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.

CALCAT

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: SO, Sp

Previous conservation statuses

2009 | At Risk – Naturally Uncommon | Qualifiers: DP, TO

2004 | Range Restricted

Distribution

Indigenous. North Island from Te Paki to about Rotorua thence disjunct to the Horowhenua. Exact distribution still unknown it was only recently (1980s) recognised from New Zealand

Habitat

Coastal to lowland (more rarely montane - up to 800 m a.s.l.). Often in gumland scrub or on open clay pans, in skeletal soils on steep rocky ridges, on the margins of peat bogs or within open sinter and rock in and around geothermal vents. More rarely found in the leaf litter under tall manuka (Leptospermum scoparium) dominated scrub or within seral forest. Usually in dry sites and plants are usually withered off and gone by November.

Features

Terrestrial dark green to reddish-green early spring flowering orchid usually occurring at solitary plants sometimes as small colonies of up to 20 plants. All parts finely but sparsely glandular hairy. Leaf solitary up to 60 x 3 mm long, linear, dark green to reddish-green. Stem erect, slender somewhat wiry, up to 100 mm tall, thin and very wiry, sparsely eglandular-glandular hairy. Floral bracts 1(-2). Flowers 1(-2) up to 10 mm diameter, in lax racemes, perianth very pale mauve, pale pink, reddish or white often suffused pale china blue, if darker coloured usually fading to pink or white near flower centre. Sepals up to 3 mm long, narrowly-lanceolate to broadly lanceolate, apex acute to subacute; dorsal sepal erect, others spreading. Petals up to 3 mm long, lanceolate to broadly lanceolate, apex sharply acute, spreading or projecting forwards. Labellum 3-lobed, marked with transverse cerise bars, disc with 2 more or less equal lines of stalked calli extending nearly to apex, stalks white, clavate, callus heads yellow, lateral lobes erect, column-embracing, more or less entire, often finely crimpled to crenulate toward mid-lobe; mid-lobe broadly triangular, strongly recurved under labellum, margins entire, usually bearing a solitary, flattened, orange or yellow callus on either side of mid-lobe base. Column erect to slightly recurved, white or pale pink or mauve, marked with up to 5 darker transverse, red to cerise bars, column wings distinctly broadening toward apex.

Similar taxa

Easily recognised by the early flowering habit, small size and solitary flower. The flower is often suffused pale china blue, or pinkish, pale mauve or even red. Sometimes it can be completely white. The tepals are distinctively sharply acute. The labellum offers the main distinguishing characters, the lamina, side-lobes are marked with cerise bars. The labellum calli are in two rows, spheroidal and yellow-topped, while the mid-lobe has a distinctive curled under yellow or orange tip and it usually bears at its base, on either side, a single flattened orange or dark sulphur yellow marginal callus. The column is weakly curved and marked with cerise bars.

Flowering

August - November

Flower colours

Red/Pink, White

Fruiting

October - January

Propagation technique

Difficult - should not be removed from the wild

Threats

In New Zealand Caladenia alata is a biologically sparse species usually occurring in diffuse, often widely scattered populations of few to many individuals.

Etymology

alata: From the Latin ala ‘wing’ meaning ‘winged’

Where To Buy

Not commercially available

TAXONOMIC NOTES

Jones et al. (2001) revived the genus Petalochilus R.S.Rogers (erected by Rogers (1924) for what has come to be viewed as a peloric state of Caladenia R.Br. - see Moore & Edgar (1970)) for a distinct clade of mostly New Zealand orchids that had usually been referred to as Caladenia. Subsequently Hopper et al. (2004) showed how the reorganisation of Caladenia by Jones et al. (2001) was unworkable and they recommended a return to Caladenia and the other allied Australian genera that had been recognised previously. Following discussion with S. Hopper and P. Weston (pers. comm., 2011, 2014) the treatment of Hopper et al. (2004) is preferred to that of Jones et al. (2001) and so followed here.

Attribution

Fact Sheet prepared for NZPCN by P.J. de Lange 14 April 2007. Description based on herbarium specimens and subsequently published in de Lange et al. (2007).

References and further reading

de Lange, P.; Rolfe, J. St George, I. Sawyer J. 2007: Wild orchids of the lower North Island. Department of Conservation, Wellington. 194pp.

Hopper, S.D.; Brown, A.P. 2004: Robert Brown’s Caladenia revisited, including a revision of its sister genera Cyanicula, Ericksonella and Pheladenia (Caladeniinae: Orchidaceae). Australian Systematic Botany 17: 1-240.

Jones, D.L.; Clements, M.A.; Sharma, I.K.; Mackenzie, A.M. 2001: A New Classification of Caladenia R.Br. (Orchidaceae). The Orchadian 13: 389-419.

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

Rogers, R.S. 1924: Petalochilus: a New Genus of New Zealand Orchids. Journal of Botany 62: 65-67.

NZPCN Fact Sheet citation

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

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