Pterostylis chocolatina
| Chocolate-lip leafy greenhood | |
|---|---|
| Scientific classification | |
| Kingdom: | Plantae |
| (unranked): | Angiosperms |
| (unranked): | Monocots |
| Order: | Asparagales |
| Family: | Orchidaceae |
| Subfamily: | Orchidoideae |
| Genus: | Pterostylis |
| Species: | P. chocolatina |
| Binomial name | |
| Pterostylis chocolatina (D.L.Jones) G.N.Backh.[1] | |
| Synonyms[2] | |
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| |
Pterostylis chocolatina, commonly known as the chocolate-lip leafy greenhood, is a plant in the orchid family Orchidaceae and is endemic to New South Wales. As with similar greenhoods, the flowering plants differ from those which are not flowering. The non-flowering plants have a rosette of leaves on a short stalk but the flowering plants lack a rosette and have up to thirteen green flowers on a flowering stem with stem leaves. The labellum is dark brown with a blackish lump near its base.
Description
Pterostylis chocolatina, is a terrestrial, perennial, deciduous, herb with an underground tuber. Non-flowering plants have a rosette of between three and six leaves, each leaf 10–30 mm (0.4–1 in) long and 4–7 mm (0.2–0.3 in) wide on a stalk 60–110 mm (2–4 in) high. Flowering plants lack a rosette but have between three and thirteen flowers on a flowering spike 200–900 mm (8–40 in) high with between five and eight stem leaves which are 20–100 mm (0.8–4 in) long and 3–9 mm (0.1–0.4 in) wide. The flowers are dark green with darker lines, partly transparent, 17–20 mm (0.7–0.8 in) long and 6–8 mm (0.2–0.3 in) wide. The dorsal sepal and petals are joined to form a hood called the "galea" over the column. The lateral sepals turn downwards and are 12–15 mm (0.5–0.6 in) long, 6–8 mm (0.2–0.3 in) wide and joined for about half their length. The labellum is 5–8 mm (0.2–0.3 in) long, about 3 mm (0.1 in) wide and dark brown with a blackish lump on the top end. Flowering occurs from July to September.[3]
Taxonomy and naming
The chocolate-lip greenhood was first formally described in 2006 by David Jones who gave it the name Bunochilus chocolatinus. The description was published in Australian Orchid Research from a specimen collected near Wentworth Falls.[4] In 2010, Gary Backhouse changed the name to Pterostylis chocolatina.[1]
Distribution and habitat
Pterostylis chocolatina grows between grasses and other small plants in moist, tall forest in the western Blue Mountains.[3][5]
References
- 1 2 "Pterostylis chocolatina". APNI. Retrieved 25 June 2017.
- ↑ "Pterostylis chocolatina". World Checklist of Selected Plant Families (WCSP). Royal Botanic Gardens, Kew.
- 1 2 Jones, David L. (2006). A complete guide to native orchids of Australia including the island territories. Frenchs Forest, N.S.W.: New Holland. p. 315. ISBN 1877069124.
- ↑ "Bunochilus chocolatinus". APNI. Retrieved 25 June 2017.
- ↑ "Pterostylis chocolatina". Royal Botanic Garden Sydney: plantnet. Retrieved 25 June 2017.
External links
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Data related to Pterostylis chocolatina at Wikispecies