A new Pterostylis R.Br. (Orchidaceae, Orchidoideae, Cranichideae) from New Caledonia

A new species from New Caledonia, Pterostylis longilabia M.Pignal, sp. nov. is described and illustrated. Morphological characters that distinguish the new taxon from the related species, P ophioglossa R.Br. are essentially a lip of the same length as the median sepal, without basal extension (instead of a shorter lip with a fimbriated extension at its base) and a narrowly angled sinus between the synsepals (instead of a rounded or open-angle sinus). Due to the high threats to its locality, the proposed IUCN conservation status is EN (Endangered). An identification key is given for New Caledonian Pterostylis species in English and French.

Automated summary

A new species from New Caledonia, Pterostylis longilabia M.Pignal, sp. nov. is described and illustrated, with distinguishing morphological features such as a lip of the same length as the median sepal and a narrowly angled sinus between the synsepals. Due to threats to its locality, it is proposed to be classified as Endangered according to IUCN conservation status. An identification key is provided for New Caledonian Pterostylis species in English and French.