Corybas limpidus
| Crystal helmet orchid | |
|---|---|
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Monocots |
| Order: | Asparagales |
| Family: | Orchidaceae |
| Subfamily: | Orchidoideae |
| Tribe: | Diurideae |
| Genus: | Corybas |
| Species: | C. limpidus
|
| Binomial name | |
| Corybas limpidus | |
| Synonyms[1] | |
Corybas limpidus, commonly known as the crystal helmet orchid,[2] is a species of terrestrial orchid endemic to Western Australia. It has round or heart-shaped leaf and a translucent greenish flower with dark red or burgundy-coloured spots and blotches. The edges of the labellum have a few short, blunt teeth.
Description
[edit]Corybas limpidus is a terrestrial, perennial, deciduous, herb with a single thin, round or broad heart-shaped leaf 20–35 mm (0.8–1 in) long and wide. The leaf is green on the upper surface and silvery green on the lower side. There is a single erect, translucent green flower with dark red spots and blotches, 10–15 mm (0.4–0.6 in) long and 7–10 mm (0.3–0.4 in) wide. The dorsal sepal is burgundy-coloured, 16–18 mm (0.6–0.7 in) long and 5–7 mm (0.2–0.3 in) wide and curves forward over the labellum. The lateral sepals are green, about 5 mm (0.2 in) long, 0.5 mm (0.02 in) wide, joined at their bases and taper to a fine tip. The petals are about 3 mm (0.1 in) long, 0.5 mm (0.02 in) wide and taper to a thread-like tip. The labellum is longer than the dorsal sepal, 8–11 mm (0.3–0.4 in) long, 7–9 mm (0.3–0.4 in) wide with a greenish mound in the centre. The edges of the labellum have a few short, blunt teeth. Flowering occurs in August and September.[2][3][4][5][6]
Taxonomy
[edit]Corybas limpidus was first formally described in 1991 by David Jones, in Australian Orchid Research, based on specimens collected near Albany in 1986.[2][7] The specific epithet (limpidus) is a Latin word meaning "clear", "transparent" or "pure",[8] referring to the dorsal sepal and part of the labellum.[3]
In 2002, David Jones and Mark Clements proposed splitting Corybas into smaller genera and placing this species into Corysanthes but the change has not been widely accepted.[9]
Distribution and habitat
[edit]The crystal helmet orchid grows under dense shrubs between sand dunes in coastal areas from Esperance to Walpole in the Esperance Plains, Jarrah Forest and Warren biogeographic regions.[4][5][6][10]
Conservation
[edit]Corybas limpidus is classified as "Priority Four" by the Government of Western Australia Department of Parks and Wildlife,[10] meaning that is rare or near threatened.[11]
References
[edit]- ^ a b "Corybas limpidus". World Checklist of Selected Plant Families (WCSP). Royal Botanic Gardens, Kew.
- ^ a b c Jones, David L. (2006). A complete guide to native orchids of Australia including the island territories. Frenchs Forest, N.S.W.: New Holland. pp. 171–172. ISBN 1877069124.
- ^ a b Jones, David L. (1991). "New taxa of Australian Orchidaceae". Australian Orchid Research. 2: 46–47.
- ^ a b Brown, Andrew; Dixon, Kingsley; French, Christopher; Brockman, Garry (2013). Field guide to the orchids of Western Australia : the definitive guide to the native orchids of Western Australia. Simon Nevill Publications. p. 173. ISBN 9780980348149.
- ^ a b Hoffman, Noel; Brown, Andrew (2011). Orchids of South-West Australia (3rd ed.). Gooseberry Hill: Noel Hoffman. p. 279. ISBN 9780646562322.
- ^ a b Archer, William. "Corybas limpidus". Esperance Wildflowers. Retrieved 8 May 2018.
- ^ "Corybas limpidus". APNI. Retrieved 8 May 2018.
- ^ Brown, Roland Wilbur (1956). The Composition of Scientific Words. Washington, D.C.: Smithsonian Institution Press. p. 209.
- ^ Jones, D.L. (2002), "Nomenclatural notes arising from studies into the tribe Diurideae (Orchidaceae)", Orchadian, 13: 436–468
- ^ a b "Corybas limpidus". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
- ^ "Conservation codes for Western Australian Flora and Fauna" (PDF). Government of Western Australia Department of Parks and Wildlife. Retrieved 10 July 2019.