Classification
Class
Magnoliopsida Brongn.
Order
Asparagales Link
Family
Orchidaceae Juss.
Genus
Corybas Salisb.
 Nomenclature
Scientific Name:
Corybas acuminatus M.A.Clem. & Hatch, New Zealand J. Bot. 23: 491 (1985)
Synonymy:
  • ≡ Nematoceras acuminatum (M.A.Clem. & Hatch) Molloy, D.L.Jones & M.A.Clem. in Jones et al., 13: 449 (2002) – as acuminata
  • ≡ Corysanthes acuminata (M.A.Clem. & Hatch) Szlach., 3: 97 (2003)
 Description

Plant at flowering up to 6 cm high. Leaf sessile, up to 4 cm long × 2 cm broad, ovateacuminate, repand, cordate at the base; light green above, silvery below, with conspicuous reddish veining. Leaves of young plants reniform or broadly cordate, apiculate, without the reddish veining. Floral bract shortly caudate, secondary bract subulate. Flower usually solitary, sessile, more or less translucent, with dull red striae. Dorsal sepal up to 4 cm long, extended into a horizontal filiform cauda. Lateral sepals filiform, erect and very long, exceeding the flower by as much as 6 cm. Petals similar, smaller, horizontal or deflexed. Labellum with 2 rounded auricles at the base; lamina expanded, abruptly deflexed, mucronate, the margins irregularly fimbriate or entire. Column hidden in the flower, very short, with a large basal callus; Column-wings minutely denticulate and exceeding the anther; stigma orbicular, pollinia 4, massulate. Seeding peduncle up to 18 cm high.

[Reproduced from Clements & Hatch (1985, New Zealand J. Bot. 23: 491–494, as Corybas acuminatus M.A.Clem. & Hatch) with permission from The Royal Society of New Zealand.]

 Biostatus
Indigenous (Endemic)
 Bibliography
Clements, M.A.; Hatch, E. D. 1985: Corybas acuminatus (Orchidaceae) -- a new name for the species previously considered to be Corybas rivularis. New Zealand Journal of Botany 23: 491–494.
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]
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.
Lehnebach, C.A. 2016: New combinations and a replacement name for three New Zealand spider orchids (Corybas). The New Zealand Native Orchid Journal 139: 4–5.
Lehnebach, C.A.; Zeller, A.J.; Frericks, J.; Ritchie, P. 2016: Five new species of Corybas (Diurideae, Orchidaceae) endemic to New Zealand and phylogeny of the Nematoceras clade. Phytotaxa 270(1): 1–24.
Szlachetko, D.L.; Rutkowski, P. 2003: Quelques notes additionnelles sur la sous-famille Thelymitroideae (Orchidaceae). Richardiana 3(2): 90–100.