Carex davalliana explained

Carex davalliana, or Davall's sedge, is a species of sedge found in inland wetlands across continental Europe. It is dioecious, with male and female flowers on separate plants.^[1]

Distribution

The species became extinct across the British Isles in 1852 and has not reestablished since.^[2] It was only ever identified at one site in the British Isles (a calcareous mire near Bath, Somerset). It became extinct when the land was drained for building houses.^[3]

Notes and References

1. Book: Tutin. T. G.. etal. Flora Europaea. Volume 5, Alismataceae to Orchidaceae (monocotyledones). 1980. Cambridge University Press. Cambridge, England . 978-0-521-20108-7 . Reprinted . . 7 April 2015.
2. Web site: 7 extinct plants in the UK and rarest plants to save. www.woodlandtrust.org.uk.
3. Web site: Carex davalliana | Online Atlas of the British and Irish Flora. www.brc.ac.uk.