Pterostylis trullifolia
Common name
trowel-leaved orchid
Synonyms
Pterostylis rubella Colenso; Pterostylis trullifolia var. gracilis Cheeseman; Diplodium trullifolium (Hook.f.) D.L.Jones, Molloy et M.A.Clem.
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.
DIPTRU
Chromosome number
2n = 50
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). 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. Three Kings, North and South Islands to about Canterbury and north Westland
Habitat
Coastal to montane (up to 1100 m a.s.l.). Usually on the forest floor in sparse leaf litter, open clay pans under scrub or amongst mosses in semi-shaded successional forest. Occasional invades rough pasture and lawns bordering forest remnants. Often found growing with Pterostylis alobula.
Features
Terrestrial, colony forming, perennial herb. Plants at flowering up to 320 mm tall. Stem green or reddish-green, slender, terete, mostly smooth, sometimes with the upper internodes minutely rugose; internodes usually > leaves. Petiolate leaves in a compact rosette at base of flowering stem; petiole distinct up to 10 mm long (usually less) not winged; leaf lamina 5-10 x 5-10 mm, dark green to green or reddish-green, broad-ovate to orbicular-cordate, apex acute to subacute, veins raised on upper leaf surface imparting a distinctly rugose, bullate-alveolate (embossed) texture. Cauline leaves 2-8, 5-20 x 2-5 mm, dark green, green to reddish-green, lowermost shortly petiolate and more or less trowel-shaped, grading into sessile, linear-lanceolate leaves, uppermost rarely overtopping ovary. Flower 1(-2) erect, green and white striped rarely tinged with red. Dorsal sepal 10-15 mm tall, apex acuminate, more or less horizontal; lateral sepals diverging at a wide angle forming a U or wide W shape when viewed from the front, sinus abruptly and prominently jugate in side view, tips long-caudate and much overtopping galea. Petals almost as long as dorsal sepal, with only a narrow marginal strip exposed. Labellum narrow-triangular, arched and protruding, apex subacute. Column shorter than labellum; stigma elliptic, slightly prominent.
Similar taxa
Most likely to be confused with Pterostylis alobula from which it differs by its distinctly embossed rosette leaves, more slender, taller habit, smaller often red-tinged flowers, and by the more slender apex of the labellum which lacks the inverted U typical of P. alobula.
Flowering
May - September
Flower colours
Green, White
Fruiting
July - January
Life cycle
Minute seeds are wind dispersed (Thorsen et al., 2009).
Propagation technique
Moderately easy to grow, especially in a pot. Should not be removed from the wild.
Etymology
pterostylis: Winged column
Taxonomic notes
Jane et al. (2010) following a thorough rDNA (ITS) based analysis of the segregate genera erected for Pterostylis R.Br. by Szlachekto (2001) and Jones et al. (2002) found no support to continue their recognition. This view, in the process of being adopted by the Australian Plants Names Index, is followed here.
Attribution
Fact Sheet prepared for NZPCN by P.J. de Lange (14 April 2007). Description adapted from Moore & Edgar (1970)
References and further reading
Janes, J.K.; Dorothy A. S.; Vaillancourt, R.E.; Duretto, M.F. 2010: A new classification for subtribe Pterostylidinae (Orchidaceae), reaffirming Pterostylis in the broad sense. Australian Systematic Botany 23: 260–269
Jones, D.L.; Clements, M.A.; Molloy, B.P.J 2002: A Synopsis of the Subtribe Pterostylidinae. Australian Orchid Research 4: 129-146.
Moore, L.B.; Edgar, E. 1970: Flora of New Zealand. Vol. II. Government Printer, Wellington.
Szlachekto, D.L. 2001: Genera et Species Orchidalium 1. Polish Botanical Journal 46: 11-26.
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 11: 285-309
NZPCN Fact Sheet citation
Please cite as: de Lange, P.J. (Year at time of access): Pterostylis trullifolia Fact Sheet (content continuously updated). New Zealand Plant Conservation Network. https://www.nzpcn.org.nz/flora/species/pterostylis-trullifolia/ (Date website was queried)