Pterostylis

Greenhood
Pterostylis coccina
Scientific classification
Kingdom:	Plantae
(unranked):	Angiosperms
(unranked):	Monocots
Order:	Asparagales
Family:	Orchidaceae
Subfamily:	Orchidoideae
Tribe:	Diurideae
Subtribe:	Pterostylidinae
Genus:	Pterostylis R.Br., 1810
Type species
Pterostylis curta
Species
See text.

Pterostylis coccina, sepals and petals removed
(1) - Lip
(2) - Hinge
(3) - stigma
(4) - pollinia

Pterostylis is a terrestrial deciduous genus of some 100 or so species of orchids found mainly in New Zealand, Australia, Papua New Guinea and New Caledonia. The common name of this orchid is Greenhood - a number of species have green flowers with the dorsal sepal forming a "hood" over the rest of the flower. The name Pterostylis is based on the Greek words meaning winged column (pteron - a wing, stylis - a column). In a number of species, the flower has a hinged lip that swings backwards when touched by an insect, forming a tube with the column and wings. The trapped insect is then forced to crawl out of the tube, removing the pollinia in the process.

Species

• Pterostylis acuminata
• Pterostylis agathicola
• Pterostylis alobula
• Pterostylis alpina
• Pterostylis alveata
• Pterostylis areolata
• Pterostylis auriculata
• Pterostylis australis
• Pterostylis banksii
  • var. banksii
  • var. silvicultrix
• Pterostylis baptistii
• Pterostylis barbata
• Pterostylis basaltica
• Pterostylis brumalis
• Pterostylis caulescens
• Pterostylis cardiostigma
• Pterostylis cernua
• Pterostylis coccina
• Pterostylis collina
• Pterostylis concinna
• Pterostylis cucullata
• Pterostylis curta
• Pterostylis cycnocphala
• Pterostylis despectans
• Pterostylis foliata
• Pterostylis gibbosa
• Pterostylis graminea
• Pterostylis grandiflora
• Pterostylis humilis
• Pterostylis irsoniana
• Pterostylis irwinii
• Pterostylis melagramma
• Pterostylis micromega
• Pterostylis montana
  • var. montana
  • var. rubricaulis
• Pterostylis mutica
• Pterostylis nana
• Pterostylis nutans
• Pterostylis oliveri
• Pterostylis ophioglossa
• Pterostylis papuana
• Pterostylis parviflora
• Pterostylis patens
• Pterostylis paludosa
• Pterostylis plumosa
• Pterostylis porrecta
• Pterostylis praetermissa
• Pterostylis puberula
• Pterostylis recurva
• Pterostylis reflexa
• Pterostylis revoluta
• Pterostylis rufa
• Pterostylis sanguinea
• Pterostylis saxicola
• Pterostylis stenochila
• Pterostylis tanypoda
• Pterostylis tasmanica
• Pterostylis tristis
• Pterostylis trullifolia
  • var. gracillis
  • var. trullifolia
• Pterostylis valida
• Pterostylis venosa
• Pterostylis woolsii

• 

  Pterostylis curta

• 

  Pterostylis grandiflora

• 

  Pterostylis melagramma

• 

  Pterostylis stenochila setting seeds

• 

  Pterostylis "Bluff"

References

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• Flora of New Zealand, Volume II
• Pterstylis on Florabase for the 68 species found in Western Australia

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