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  4. Pterostylis foliata

Pterostylis foliata

Palliser Bay.<br>Photographer: Jeremy R. Rolfe, Date taken: 23/10/1994, 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>
Palliser Bay.<br>Photographer: Jeremy R. Rolfe, Date taken: 23/10/1994, 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>
Aorangi Forest Park.<br>Photographer: Jeremy R. Rolfe, Date taken: 02/10/2010, 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>
Aorangi Forest Park.<br>Photographer: Jeremy R. Rolfe, Date taken: 02/10/2010, 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>
Aorangi Forest Park.<br>Photographer: Jeremy R. Rolfe, Date taken: 02/10/2010, 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>
On bank under mānuka (Leptospermum scoparium) scrub, Plimmerton.<br>Photographer: Jeremy R. Rolfe, Date taken: 01/11/2016, 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>
On bank under mānuka (Leptospermum scoparium) scrub, Plimmerton.<br>Photographer: Jeremy R. Rolfe, Date taken: 01/11/2016, 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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Common name

grassland greenhood

Synonyms

Pterostylis gracilis Nicholls, Pterostylis vereenae R.S.Rogers

Family

Orchidaceae

Authority

Pterostylis foliata Hook.f.

Flora category

Vascular – Native

Endemic taxon

No

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.

PTEFOL

Chromosome number

2n = 44-46

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

2004 | Not Threatened

Distribution

Indigenous. In New Zealand known from the North and South Islands. Present also in Australia

Habitat

Coastal to montane (up to 800 m a s.l.) in grassland, amongst low scrub, within open forest and within plantation forest. Often found growing with the adders tongue fern (Ophioglossum coriaceum A.Cunn.).

Features

Terrestrial, tuberous, glabrous, spring to summer-green perennial herb, either solitary or forming small colonies of 3-6 plants through vegetative extension. Plant at flowering 150-400 mm tall. Stem stiffly erect, smooth or sparsely and unevenly puberulent, dark green to yellow green; usually elongating following fruit set; upper internodes usually longer than stem leaves. Basal leaves 2-4, yellow-green to dark green, sessile, arranged in a more or less loose to crowded rosette; lamina up to 80 x 25 mm, elliptic, margins smooth, crisped or undulose, apex subacute, gradually narrowed into a short, winged petiole. Cauline leaves 1-2, yellow-green to green, 20-30 mm long, more or less foliaceous, closely sheathing, uppermost sometimes reaching but scarcely overtopping flower. Flower solitary, erect, white with broad green to greenish-brown stripes, often brown toward the apex. Ovary erect, papillose. Dorsal sepal 20-30 x 20 mm long, erect for two thirds of length then curving forwards, apex acute and more or less horizontal, extending no further than petals; lateral sepals closely embracing galea, papillose on the fused portion, sinus narrow, not protruding, diverging at a narrow angle, tips caudate up to 18 mm long and overtopping galea. Petals only a littler shorter than dorsal sepal, broad almost to apex. Labellum dark green above and paler beneath, protruding, narrow-triangular, arched, tapering to a narrowly obtuse apex, margins slightly upturned. Column shorter than labellum; stigma elliptic, more or less prominent.

Similar taxa

None. The yellow-green to dark green plants, with their stiffly erect stems bearing closely sheathing bract like leaves; basal leaves which are arranged in a loose rosette, and usually with crisped or wavy margins; and small, erect brownish flowers readily distinguish this species from all other indigenous Pterostylis species.

Flowering

October - December

Flower colours

Brown, Green

Fruiting

December - April

Propagation technique

Difficult - should not be removed from the wild. Basic orchid mix consists of 2 parts medium coarse sand, ideally clean river sand; 2 parts soil, humus or leaf-mould; 1 part weathered sawdust or rotting wood; 1 part granulated bark. For Pterostylis shade of 50% and pots kept evenly moist.

Etymology

pterostylis: Winged column

foliata: Leafy

Where To Buy

Not commercially available

Attribution

Fact Sheet prepared for NZPCN by P.J. de Lange 14 April 2007: 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.

NZPCN Fact Sheet citation

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

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