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Pterostylis foliata

From Wikipedia, the free encyclopedia

Slender greenhood
Pterostylis foliata growing near Anglesea
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Orchidaceae
Subfamily: Orchidoideae
Tribe: Cranichideae
Genus: Pterostylis
Species:
P. foliata
Binomial name
Pterostylis foliata

Pterostylis foliata, commonly known as the slender greenhood, is a species of orchid widespread in south-eastern Australia and New Zealand. Flowering plants have a rosette of three to six, dark green, crinkled leaves crowded around the flowering stem and a single dark green and brown flower with a deep V-shaped sinus between the lateral sepals.

Description

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Pterostylis foliata is a terrestrial, perennial, deciduous, herb with an underground tuber. Flowering plants have a rosette of between three and six dark green, crinkled leaves crowded around the base of the flowering stem, each leaf 30–80 mm long and 10–16 mm wide. A single flower 17–20 mm long and 7–9 mm wide is borne on a spike 120–300 mm high. The flowers are dark green and brown. The dorsal sepal and petals are fused, forming a hood or "galea" over the column but the dorsal sepal is longer than the petals and has a sharp point on its end. The lateral sepals are erect and in contact with the galea, and there is a deep, V-shaped sinus between the lateral sepals. The labellum is 12–15 mm long, 2–3 mm wide, brown and blunt and protrudes above the sinus. Flowering occurs from August to January.[2][3][4][5][6][7]

Taxonomy and naming

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Pterostylis foliata was first formally described in 1853 by Joseph Dalton Hooker from a specimen collected in the Ruahine Mountains on the North Island of New Zealand. The description was published in Flora Novae-Zelandiae.[1][8] The specific epithet (foliata) is a Latin word meaning "leafy".[9]

Distribution and habitat

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The slender greenhood usually grows in moist, grassy forest in shady places. It is widespread but uncommon in New South Wales south from near Batlow, in Victoria, south-eastern South Australia, Tasmania and both islands of New Zealand.[2][3][4][5][6][7]

References

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  1. ^ a b "Pterostylis foliata". APNI. Retrieved 15 May 2017.
  2. ^ a b Jones, David L. (2006). A complete guide to native orchids of Australia including the island territories. Frenchs Forest, N.S.W.: New Holland. p. 307. ISBN 978-1877069123.
  3. ^ a b Jones, David L. "Pterostylis foliata". Royal Botanic Garden Sydney: plantnet. Retrieved 15 May 2017.
  4. ^ a b Jeanes, Jeff. "Pterostylis foliata". Royal Botanic Gardens Victoria: vicflora. Retrieved 15 May 2017.
  5. ^ a b "Pterostylis foliata". State Herbarium of South Australia:eflora SA. Retrieved 15 May 2017.
  6. ^ a b "Pterostylis foliata". New Zealand Native Orchid Group. Retrieved 15 May 2017.
  7. ^ a b "Pterostylis foliata". New Zealand Plant Conservation Network. Retrieved 15 May 2017.
  8. ^ Hooker, Joseph Dalton (1853). The botany of the Antarctic voyage of H.M. discovery ships Erebus and Terror. II. Flora Novae-Zelandiae. London: Lovell Reeve and Co. p. 249. Retrieved 15 May 2017.
  9. ^ Brown, Roland Wilbur (1956). The Composition of Scientific Words. Washington, D.C.: Smithsonian Institution Press. p. 340.