Scientific Name:
Pterostylis graminea Hook.f., Bot. Antarct. Voy. II. (Fl. Nov.-Zel.) Part I, 248 (1853)

Plant c. 5–25–(30) cm. tall at fl. Stem erect, smooth, internodes < lvs. Lvs mostly 4–6, the size changing from below upwards, the largest lf on a stem c. 5–15 × 0.5–1 cm.; all linear-lanceolate, ± keeled, long-acuminate, widest near sessile sheathing base, us. overtopping fl. Fl. solitary, ovary us. erect. Dorsal sepal c. 1.5–3 cm. tall, distal part ± horizontal, tip acuminate to shortly caudate; lateral sepals diverging at a narrow angle, tips caudate and ± erect, overtopping galea. Petals broad almost to tip, a little shorter than dorsal sepal. Labellum oblong, little arched. Column about as tall as labellum; stigma narrow, not prominent.

[From: Moore and Edgar (1970) Flora of New Zealand. Volume 2.]

Indigenous (Endemic)
de Lange, P.J.; Rolfe, J.R.; Barkla J.W.; Courtney, S.P.; Champion, P.D.; Perrie, L.R.; Beadel, S.N.; Ford, K.A.; Breitwieser, I.; Schönberger, I.; Hindmarsh-Walls, R.; Heenan, P.B.; Ladley, K. 2018: Conservation status of New Zealand indigenous vascular plants, 2017. New Zealand Threat Classification Series. No. 22. [Not Threatened]
de Lange, P.J.; Rolfe, J.R.; Champion, P.D.; Courtney, S.P.; Heenan, P.B.; Barkla, J.W.; Cameron, E.K.; Norton, D.A.; Hitchmough, R.A. 2013: Conservation status of New Zealand indigenous vascular plants, 2012. New Zealand Threat Classification Series 3. Department of Conservation, Wellington. [Not Threatened]
Hooker, J.D. 1852–1853 ("1853"): The Botany of the Antarctic Voyage of H.M. Discovery Ships Erebus and Terror in the Years 1839–1843, under the command of Captain Sir James Clark Ross. II. Flora Novae-Zelandiae. Part I. Flowering plants. Lovell Reeve, London.
Jones, D.L.; Clements, M.A.; Molloy, B.P.J 2002: A Synopsis of the Subtribe Pterostylidinae. Australian Orchid Research 4: 129–146.