Pterostylis venosa
Common names
greenhood
Synonyms
Pterostylis confertifolia Allan, Pterostylis trifolia Colenso
Family
Orchidaceae
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.
PTEVEN
Chromosome number
2n = 44
Current conservation status
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) – more information about this can be found on the NZTCS website. This report includes a statistical summary and brief notes on changes since 2012 and replaces all previous NZTCS lists for vascular plants.
Please note, threat classifications are often suggested by authors when publications fall between NZTCS assessment periods – an interim threat classification status has not been assessed by the NZTCS panel.
- Conservation status of New Zealand indigenous vascular plants, 2017 . 2018. 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. Department of Conservation. Source: NZTCS and licensed by DOC for reuse under the Creative Commons Attribution 4.0 International licence.
2017 | Not Threatened
Previous conservation statuses
2012 | Not Threatened
2009 | Not Threatened
2004 | Not Threatened
Distribution
Endemic. New Zealand: North Island, South Island, Stewart Island/Rakiura.
Habitat
Mostly montane extending to lowlands in the southern part of its range. Usually in beech (Nothofagaceae) forest where it often grows in deep, damp drifts of moss or leaf litter in heavy shade or well lighted situations.
Detailed description
Terrestrial, tuberous, glabrous, spring to summer-green perennial herb, forming small patches of 3–many plants through vegetative extension. Plant at flowering (30)–50–100 mm tall. Stem erect, smooth, dark green, to reddish green, usually immersed within a loose basal rosette of leaves until the fruiting ovary elongates the stem. Leaves erect to somewhat spreading, 2–4, margins entire, though usually undulose in the basal ⅓, overtopping or at least equally the flower; lamina 30–60 × 10–25 mm, dark green to yellow green, broadly oval, rarely orbicular, apex obtuse to broadly subacute, base gradually narrowing into a broadly winged sheathing petiole. Flower solitary, erect, dark green to yellow green, white striped. Ovary mostly erect. Dorsal sepal 15 mm tall, erect then horizontal; apex acute to very shortly acuminate. Lateral sepals diverging at a narrow angle, initially erect, apex acuminate to shortly caudate, scarcely overtopping galea. Petals almost as long as dorsal sepal, broad almost to apex. Labellum narrowly triangular, arcuate, protruding. apex subacute, inner surface copiously invested with short retrorse hairs imparting a furry appearance. Column shorter than labellum; stigma narrow elliptic, not upturned.
Manaaki Whenua Online Interactive Key
Similar taxa
Very close to P. humilis from which it differs by the very narrow stigma which is not upturned or prominently heart-shaped, and by the abundant short retrorse hairs on the labellum surface.
Flowering
October–February
Flower colours
Green, Yellow
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
venosa: Veined
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).
Some of this factsheet information is derived from Flora of New Zealand Online and is used under a Creative Commons Attribution 3.0 New Zealand licence.
References and further reading
Moore LB, Edgar E. 1970. Flora of New Zealand, Volume II. Indigenous Tracheophyta: Monocotyledones except Gramineae. Government Printer, Wellington, NZ. 354 p.
NZPCN Fact Sheet citation
Please cite as: de Lange, P.J. (Year at time of access): Pterostylis venosa Fact Sheet (content continuously updated). New Zealand Plant Conservation Network. https://www.nzpcn.org.nz/flora/species/pterostylis-venosa/ (Date website was queried)