Pterostylis foliata
| Slender greenhood | |
|---|---|
| |
| Pterostylis foliata growing near Anglesea | |
Scientific 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
[edit]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
[edit]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
[edit]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
[edit]- ^ a b "Pterostylis foliata". APNI. Retrieved 15 May 2017.
- ^ 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.
- ^ a b Jones, David L. "Pterostylis foliata". Royal Botanic Garden Sydney: plantnet. Retrieved 15 May 2017.
- ^ a b Jeanes, Jeff. "Pterostylis foliata". Royal Botanic Gardens Victoria: vicflora. Retrieved 15 May 2017.
- ^ a b "Pterostylis foliata". State Herbarium of South Australia:eflora SA. Retrieved 15 May 2017.
- ^ a b "Pterostylis foliata". New Zealand Native Orchid Group. Retrieved 15 May 2017.
- ^ a b "Pterostylis foliata". New Zealand Plant Conservation Network. Retrieved 15 May 2017.
- ^ 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.
- ^ Brown, Roland Wilbur (1956). The Composition of Scientific Words. Washington, D.C.: Smithsonian Institution Press. p. 340.