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Pterostylis coccinea 270903.jpg
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
R.Br., 1810
  • Diplodium Sw.
  • Oligochaetochilus Szlach.
  • Plumatichilos Szlach.
  • Bunochilus D.L.Jones & M.A.Clem.
  • Crangonorchis D.L.Jones & M.A.Clem.
  • Eremorchis D.L.Jones & M.A.Clem.
  • Hymenochilus D.L.Jones & M.A.Clem.
  • Linguella D.L.Jones & M.A.Clem.
  • Petrorchis D.L.Jones & M.A.Clem.
  • Pharochilum D.L.Jones & M.A.Clem.
  • Ranorchis D.L.Jones & M.A.Clem.
  • Speculantha D.L.Jones & M.A.Clem.
  • Stamnorchis D.L.Jones & M.A.Clem.
  • Taurantha D.L.Jones & M.A.Clem.
  • Urochilus D.L.Jones & M.A.Clem.
Pterostylis coccina, sepals and petals removed
(1) - Lip
(2) - Hinge
(3) - stigma
(4) - pollinia
Pterostylis pyramidalis - Snail orchid

Pterostylis is a terrestrial deciduous genus of some 200 or so species of orchids found in central and eastern Indonesia, New Zealand, Australia, New Guinea and New Caledonia.[1] 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.




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