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  4. Aporostylis bifolia

Aporostylis bifolia

Southern Tararua Range.<br>Photographer: Jeremy R. Rolfe, Date taken: 23/12/2007, 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>
Southern Tararua Range.<br>Photographer: Jeremy R. Rolfe, Date taken: 23/12/2007, 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>
Mount Climie, northern Remutaka Range.<br>Photographer: Jeremy R. Rolfe, Date taken: 10/01/2004, 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>
Southern Tararua Range.<br>Photographer: Jeremy R. Rolfe, Date taken: 23/12/2007, 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>
Southern Tararua Range.<br>Photographer: Jeremy R. Rolfe, Date taken: 23/12/2007, 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>
Southern Tararua Range.<br>Photographer: Jeremy R. Rolfe, Date taken: 23/12/2007, 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>
Aporostylis bifolia.<br>Photographer: Alastair Robertson, Licence: All rights reserved.
Routeburn, Fiordland.<br>Photographer: John Sawyer, 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>
Silverpeaks.<br>Photographer: John Barkla, Date taken: 01/12/2012, 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>
Auckland Island.<br>Photographer: Jane Gosden, 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>
Auckland Island.<br>Photographer: Jane Gosden, 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>
Auckland Island.<br>Photographer: Jane Gosden, 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>
Auckland Island.<br>Photographer: Jane Gosden, 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>
Auckland Island.<br>Photographer: Jane Gosden, 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>
Leaf details, northern Southland.<br>Photographer: Jesse Bythell, Date taken: 26/11/2015, 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>
Darran Mountains, Fiordland, 700 m asl.<br>Photographer: Jesse Bythell, Date taken: 29/12/2014, 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>
Southern Tararua Range.<br>Photographer: Jeremy R. Rolfe, Date taken: 27/11/2010, 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>
Bull Mound, southern Tararua Range.<br>Photographer: Jeremy R. Rolfe, Date taken: 30/12/2014, 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

odd-leaved orchid

Synonyms

Caladenia ?bifolia Hook.f.; Chiloglottis traversii F.Muell.; Caladenia macrophylla Col.; Chiloglottis bifolia (Hook.f.) Schlechter

Family

Orchidaceae

Authority

Aporostylis bifolia (Hook.f.) Rupp et Hatch

Flora category

Vascular – Native

Endemic taxon

Yes

Endemic genus

Yes

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.

APOBIF

Chromosome number

2n = 40

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 | Not Threatened

Previous conservation statuses

2009 | Not Threatened

2004 | Not Threatened

Distribution

Endemic monotypic New Zealand genus. Known from the North, South, Stewart, Chatham, Auckland, Campbell and Antipodes Islands. In the North Island present from Te Moehau south. Widespread elsewhere.

Habitat

Initially subalpine to high monatne but descending to lowland and coastal habitats in southern half of range. A species of bogs, seepages and damp open ground, shrubland, tussock grassland or forest. Often found in plantation foresty, particularly under pines.

Features

Stocky, glandular-pubescent, terrestrial, perennial spring to summer-green, tuberous herb. Tubers globose-conical. Plant at flowering up to 200 mm tall. Stem erect, slender, densely glandular-pubescent, green to reddish-green. Leaves near stem base, close to ground, paired, close-set, dark green to green, usually brown or purple spotted, densely to sparsely covered in glandular pubescent hairs, these forming an obvious marginal fringe; lower leaf 100-200 mm long, the upper leaf usually conspicuously shorter; lamina broadly ovate-oblong, broadly oblong, broadly lanceolate, elliptic, rarely linear-lanceolate. Flower usually solitary, rarely paired, subtended by a partially sheathing floral bract; bract partially enclosing ovary. Perianth up to 250 mm diameter, white or pink, glandular-pubescent. Sepals more or less externally glandular-pubescent; dorsal sepal upper most, shallowly concave, wider than laterals, slightly arched over column, lateral sepals similar to petals, linear-lanceolate, wide-spreading. Petals similar but slightly shorter. Labellum sessile, simple, orbicular-obovate broadly expanded with narrower base, margins entire; calli near base, linear to linear-elliptic, yellow, in two median more or less longitudinal rows. Column elongate, erect to slightly curved, column-wings fused in front of base, narrow to level of stigma, there wider and extending upwards as small, sharply pointed lobes, one either side of anther. Anther terminal, apiculate, papillose, pollinia two per cell, pollen finely granular. Stigma discoid, rostellum median.

Similar taxa

Most likely to be confused with species of Petalochilus Rogers (Caladenia R.Br.) and Myrmichelia D.L.Jones et M.A.Clem. and Simpliglottis Szlach. (both formerly Chiloglottis R.Br.) on account of its broad shortly petiolate leaves. From Petalochilus it differs by its two rather than usually one, broadly ovate-oblong rather than linear or linear-lanceolate, green usually brown or purple-spotted, rather than uniformly green to reddish-green leaves. From Simpliglottis and Myrmechila it differs by its glandular hairy leaves and flowers with white sepals and petals.

Flowering

October - March

Flower colours

Red/Pink, White

Fruiting

December - May

Life cycle

Minute seeds are wind dispersed (Thorsen et al., 2009).

Propagation technique

Difficult - should not be removed from the wild

Etymology

aporostylis: Perplexing style

bifolia: From Latin ‘bis’ and ‘folius’, meaning two leaves

Where To Buy

Not commercially available

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.

Thorsen, M. J.; Dickinson, K. J. M.; Seddon, P. J. 2009. Seed dispersal systems in the New Zealand flora. Perspectives in Plant Ecology, Evolution and Systematics 2009 Vol. 11 No. 4 pp. 285-309

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