Sunday 19 May
Lady’s slipper orchid (Cypripedium calceolus)
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Lady’s slipper orchid fact file
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Lady’s slipper orchid description
The lady's slipper orchid is Britain's rarest and most impressive orchid. The exotic looking flowers have claret petals that frame a beautiful bright yellow pouch (5). The specific name calceolus derives from the Latin for 'shoe' (6), and like the English name of this orchid, refers to the slipper-like appearance of the pouch. Each stem usually supports one or two flowers, but rarely three (2). The leaves have obvious nerves along their length and are mid-green in colour (2).Top
Lady’s slipper orchid biology
Thought to be one of the slowest-growing plants in the world, the lady's slipper orchid takes between 6 and 11 years of growth before it actually produces flowers (12). The seeds are minute, dust-like particles that contain no food reserves. The materials needed for germination are derived from a symbiotic association with a mycorrhizal fungus. Orchids can be difficult to propagate in artificial conditions for this reason, but the lady's slipper orchid has been studied and successful
Lady’s slipper orchid range
In the UK, this orchid once had a widespread but localised distribution in northern England and was known from Cumbria, Durham, Yorkshire and areas of the southern Pennines in the Peak District of Derbyshire (3). Although this species was never common (7), it suffered a severe decline in the 19th century due to over-collection for horticulture; at one point there was just a single flowering plant in existence (8). At present just one native population is currently known from a carefully guarded site (3). The species is at the western extreme of its range in the UK (9). Elsewhere it is known from France across central and northern Europe to Russia, northeast China, Korea and northern Japan (10).Top
Lady’s slipper orchid habitatTop
Lady’s slipper orchid status
Classified as Critically Endangered in the Red List of Great Britain, Listed under Appendix II of the Bern Convention and Annexes II and IV of the Habitats Directive (3), and Appendix II of CITES (4). It is fully protected under Schedule 8 of the Wildlife and Countryside Act 1984 and listed on Schedule 4 of the Conservation Regulations, 1994 (3).Top
Lady’s slipper orchid threats
The lady's slipper orchid has suffered at the hands of collectors and gardeners. Furthermore, its habitat has been destroyed as a result of increased grazing pressures (3).Top
Lady’s slipper orchid conservation
This orchid has been targeted by a successful Species Recovery Programme since 1982 (run by English Nature since 1992) and is a priority species under the UK Biodiversity Action Plan (BAP) (3). The remaining native population is carefully managed, and has benefited from wardening, suitable habitat management and the re-introduction of
The site supporting the native population has been designated as a candidate Special Area of Conservation, but the location has been kept a secret to safeguard the species (15). The Species Recovery Programme aims to reintroduce the species to 12 sites before the year 2004, and improve current understanding of the needs of this orchid in the wild (14).Top
Find out more
For more information on the Sainsbury Orchid Conservation project see:
Information authenticated by Royal Botanic Gardens, Kew
http://www.rbgkew.org.uk/ and Tim Rich of the National Museums and Galleries of Wales.
- Measures to conserve a species or habitat that occur outside of the natural range of the species. E.g. in zoos or botanical gardens.
- A fungus that forms a close physical association with the roots of a plant, this relationship is mutually beneficial.
- Rhizomes are thickened, branching, creeping storage stems. Although most rhizomes grow laterally just along or slightly below the soil's surface, some grow several inches deep. Roots grow from the underside of the rhizome, and during the growing season new growth sprouts from buds along the top. A familiar rhizome is the ginger used in cooking.
- Symbiotic relationship
- Relationship in which two organisms form a close association, the term is now usually used only for associations that benefit both organisms (a mutualism).
- In plants, a thickened stem or root that acts as an underground storage organ. Roots and shoots grow from growth buds, called 'eyes', on the surface of the tuber.
- IUCN Red List 2000 (January, 2002)
- Orchid magic (January, 2002)
- UKBAP. Species Action Plan (January, 2002)
- The Environment Agency. (1998) Species and Habitats Handbook. The Environment Agency, Bristol.
- Mabey, R. (1996) Flora Britannica. Sinclair-Stevenson, London.
- Latin Dictionary and Grammar check (January, 2002)
- The UK orchid website (January, 2002)
- The Sainsbury Orchid Conservation project. Royal Botanic Gardens, Kew (January, 2002)
- Rareplants.co.uk (January, 2002)
- Royal Botanic Gardens, Kew. (2002) Pers. comm.
- Rich, T. (2002) Pers. comm.
- BBC Nature- plant record breakers (January, 2002)
- Royal Botanic Gardens, Kew (January, 2002)
- English Nature (January, 2002)
- JNCC SAC Information (January, 2002)
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