Ophrys insectifera
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Orchidaceae
Subfamily: Orchidoideae
Genus: Ophrys
Species:
O. insectifera
Binomial name
Ophrys insectifera
Synonyms[2]
  • Epipactis myodes (Jacq.) F.W.Schmidt
  • Malaxis myodes (Jacq.) Bernh.
  • Ophrys insectifera var. myodes L.
  • Ophrys myodes (L.) Jacq. (nom. illeg.)
  • Orchis insectifera (L.) Crantz
  • Orchis myodes (Jacq.) Bernh.

Ophrys insectifera, the fly orchid, is a species of orchid and the type species of the genus Ophrys. It is remarkable as an example of the use of sexually deceptive pollination and floral mimicry, as well as a highly selective and highly evolved plant–pollinator relationship.[3]

Description

Ophrys insectifera is a tuberous perennial, reaching 60 cm (2 ft) in height, which flowers across its range from May to July.[4] It is a slender plant, with narrow upright leaves. A flower spike may carry 1-10 flowers, which have yellow-green sepals, very reduced, dark brown/black petals resembling the antennae of an insect and a long, narrow, lobed labellum, which is dark in color, varying from maroon to black and on which there are two glossy depressions known as 'pseudo-eyes' as well as an iridescent blue/grey patch evolved to resemble an insect's glistening wings.[4] There is a rare yellow-flowered form of O. insectifera.[5] Chromosomes 2n=36

Taxonomy

The genus name "Ophrys" derives from the Greek word "ophrys", meaning eyebrow, while the Latin epithet "insectifera" means insect-bearing or insect-carrying, referring to the unusual appearance of the flowers.[6]

Distribution and habitat

It is native to Europe, growing further north than most other species in the genus Ophrys, in Scandinavia, Finland and the Baltic states, and as far south as Greece and Spain.[2][7] In the UK it is a rare species, with a southern distribution.[5]

The plant favours sites with damp, alkaline, unimproved soil. It can be found growing in beech woodlands, on forest edges, in scrub, on limestone pavement, limestone grassland, in chalk pits and wet meadows, on cliffs as well as on disused railways.[4][8]

Ecology

The name arises because its inflorescence resembles a fly, although it relies on Hymenoptera for pollination. In the UK O. insectifera is pollinated by just two species of digger wasp: Argogorytes mystaceus and Argogorytes fargeii.[4] The orchid uses scent to attract male wasps which pollinate the flowers as they attempt to mate with them. The scent released by the flowers mimic female sexual pheromones.[9]

Both of the wasp species which pollinate fly orchids in the UK feed on Umbellifer flowers as adults and on froghopper nymphs as larvae.[10][11] A. mystaceus reproduces in woodland glades, while A. fargeii reproduces in open, sparsely-vegetated habitats.[12]

Like most orchids, Ophrys insectifera depends upon a relationship with a mycorrhizal fungus in the soil around its roots. In experiments it has been found to grow in association with fungi in the Tulasnellaceae family.[13] Due to the importance of this mycorrhizal partnership, orchids are particularly vulnerable to fungicide, but also other chemicals which could impact the growth of soil fungi or cause different fungi/bacteria species to dominate the soil they grow in.[14]

Conservation

Worldwide, this species is considered 'least concern',[1] however in Great Britain its conservation status is 'vulnerable'.[15][16]

This species is mainly threatened by habitat destruction, which takes several forms: drainage of fens, coniferization of woodland and decline in coppicing of woodland. As it has a very specialized relationship with its pollinators it is also theorized to be particularly vulnerable to climate-change.[4]

See also

References

  1. 1 2 Rankou, H. (2011). "Ophrys insectifera". IUCN Red List of Threatened Species. 2011: e.T175957A7153465. doi:10.2305/IUCN.UK.2011-2.RLTS.T175957A7153465.en. Retrieved 14 September 2022.
  2. 1 2 "World Checklist of Selected Plant Families".
  3. ↑ Vereecken, Nicolas J. & Schiestl, Florian P. (2008). "The evolution of imperfect floral mimicry". Proceedings of the National Academy of Sciences. 105 (21): 7484–7488. Bibcode:2008PNAS..105.7484V. doi:10.1073/pnas.0800194105. PMC 2396721. PMID 18508972.
  4. 1 2 3 4 5 BSBI Species Account - Ophrys insectifera
  5. 1 2 First Nature - Ophrys insectifera
  6. ↑ Les Orchidees Sauvages
  7. ↑ "World Checklist of Selected Plant Families TDWG Geocodes" (PDF). – interpretation of codes
  8. ↑ Online Atlas of the British and Irish Flora
  9. ↑ Borg-Karlson, Anna-Karin; Inga Groth; Lennart Ågren & Bertil Kullenberg (1993). "Form-specific fragances from Ophrys insectifera L. (Orchidaceae) attract species of different pollinator genera. Evidence of sympatric speciation?". Chemoecology. Birkhäuser Basel. 4 (1): 39–45. doi:10.1007/BF01245895. S2CID 26694626.
  10. ↑ Nature Spot - Argogorytes mystaceus
  11. ↑ Bees, Wasps and Ants Recording Society - Argogorytes fargeii
  12. ↑ Bees, Wasps and Ants Recording Society
  13. ↑ Schweiger, Julienne M.‐I.; Bidartondo, Martin I. & Gebauer, Gerhard (2018). "Stable isotope signatures of underground seedlings reveal the organic matter gained by adult orchids from mycorrhizal fungi". Functional Ecology. 32 (4): 870–881. doi:10.1111/1365-2435.13042. hdl:10044/1/61027. S2CID 90519671.
  14. ↑ Pacific Northwest Pest Management Handbooks - Mycorrhiza
  15. ↑ BSBI - Vascular Plant Red List
  16. ↑ Plant Life - Fly Orchid
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