Classification
Class
Magnoliopsida Brongn.
Order
Asparagales Link
Family
Orchidaceae Juss.
Genus
Corunastylis Fitzg.
 Nomenclature
Scientific Name:
Corunastylis nuda (Hook.f.) D.L.Jones & M.A.Clem. in Jones et al., 13: 461 (2002)
Synonymy:
  • ≡ Prasophyllum nudum Hook.f., Bot. Antarct. Voy. II. (Fl. Nov.-Zel.) Part I, 242 (1853)
  • ≡ Genoplesium nudum (Hook.f.) D.L.Jones & M.A.Clem., Lindleyana 4: 144 (1989)
  • = Prasophyllum tunicatum Hook.f., Bot. Antarct. Voy. II. (Fl. Nov.-Zel.) Part I, 242 (1853)
  • = Prasophyllum variegatum Colenso, Trans. & Proc. New Zealand Inst. 20: 208 (1887 [1888])
 Description

Plant at fl. c.5–30–(50) cm. tall. Stem 1–3 mm. diam., green to reddish, erect and rush-like, lfless almost up to infl. Lf us. much < raceme; lamina quite inconspicuous; brown ± fibrous sheaths of old scale-lvs persist at base of plant, enclosing present tuber and remains of tubers of several earlier seasons; these underground parts large compared with aerial portions of plant. Raceme of c. 5–25 closely spaced fls. Per. reddish, often dark, narrow, ± horizontal, with a distinct knee projecting upwards. Dorsal sepal c. 2.5–3 mm. long, deeply concave, broadly ovate, with a small apiculus; laterals definitely longer, very shortly connate at base, deeply concave, elliptic, tipped with a small spathulate, easily detached "gland." Petals shorter, more membr., hair-tipped. Labellum about as long as petals, us. dark red, articulate by a narrow curved claw to long column-foot; limb broad-oblong, almost auriculate at base; calli 2, longitudinal, ± parallel, finely and closely papillose; margins ciliate, cilia us. red. Lateral processes of column as tall as anther; tips bifid, the anterior lobe more acute and most minutely ciliolate. Anther on a short filament, definitely overtopping rostellum, apiculate. Stigma about its own height above column-base.

[From: Moore and Edgar (1970) Flora of New Zealand. Volume 2 as Prasophyllum nudum Hook.f.]

 Biostatus
Indigenous (Non-endemic)
 Bibliography
Colenso, W. 1888: On new Phænogamic plants of New Zealand. Transactions and Proceedings of the New Zealand Institute 20: 188–211.
de Lange, P.J. 2002: New genera, reinstatements and combinations for New Zealand Orchidaceae (Tribe Diurideae). New Zealand Botanical Society Newsletter 68: 14–18.
de Lange, P.J.; Norton, D.A.; Courtney, S.P.; Heenan, P.B.; Barkla, J.W.; Cameron, E.K.; Hitchmough, R.; Townsend, A.J. 2009: Threatened and uncommon plants of New Zealand (2008 revision). New Zealand Journal of Botany 47: 61–96. [Naturally uncommon]
de Lange, P.J.; Norton, D.A.; Heenan, P.B.; Courtney, S.P.; Molloy, B.P.J.; Ogle, C.C.; Rance, B.D. 2004: Threatened and uncommon plants of New Zealand. New Zealand Journal of Botany 42(1): 45–76.
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. [Naturally Uncommon]
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. [as Genoplesium nudum (Hook.f.) D.L.Jones & M.A.Clem.] [Naturally Uncommon]
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. 1989: Reinterpretation of the genus Genoplesium R. Br. (Orchidaceae: Prasophyllinae). Lindleyana; Scientific Journal of the American Orchid Society 4(3): 139–145.
Jones, D.L.; Clements, M.A.; Sharma, I.K.; Mackenzie, A.M.; Molloy, B.J.P. 2002: Nomenclatural notes arising from studies into the tribe Diurideae (Orchidaceae). The Orchadian 13(10): 437–468.