Glossary
Dates
County Status
Family
Total records held
Grid Square Count
Conservation Status
Distribution Maps
Species Accounts
Dates
- First year - the earliest recorded date for a species known to the Flora Project
- Latest year - most recent known year for a species (up to 2007)
County Status
the status of each plant growing wild in Derbyshire - given as either Native, Established, Casual or Planted. (Note that few species can occur in more than one category across the county, such as (Jacob’s Ladder):
- Native - refers to plants which are believed to be present in Derbyshire entirely by natural processes
- Alien - refers to plants known or considered to have been introduced to Derbyshire by human activity, whether by accident or intent. Alien species are themselves categorised as: Established, Casual or Planted:
- Established - refers to Alien plants that maintain or spread themselves in the wild by either sexual or asexual reproduction
- Casual - refers to Alien plants that grow in the wild but which do not maintain themselves by reproduction. Casual plants do not therefore persist in any given location beyond the life span of the original colonists
- Planted - refers to Alien plants where the individuals are believed to have been deliberately placed in a natural setting
Family
Scientific name of plant family, as given in Stace (1997)
Total records held
A tally of all records held at Derby Museum (includes published errors, duplicates or records needing confirmation)
Grid Square Count
A tally of the number of complete or partial map squares in Derbyshire from which a species has been known to occur:
- Monad - a map square with sides of 1 kilometre, or a map symbol representing a record in the equivalent area. 2525 monads fall wholly within our definition of Derbyshire; a further 379 fall partly inside it. Total: 2904
- Tetrad - a map square with sides 2 km x 2km, or a map symbol representing a record in the equivalent area. 591 tetrads fall wholly within our definition of Derbyshire; a further 185 fall partly inside it. Total: 776
- Hectad - a map square with sides 10 km x 10km, or a map symbol representing a record in the equivalent area. 13 Hectads fall wholly within our definition of Derbyshire; a further 28 fall partly inside it. Total: 45
Conservation Status
One or more letter codes used to indicate if a species is designated at a European, national or
local level in either conservation legislation, red data lists for endangered wildlife, or biodiversity
action plans etc. See Table below for a fuller explanation of each code. Please note that the designation
of conservation statuses to individual species is subject to change, as can the exact definition of those
statuses. In all cases they should only be applied to plants occurring in Derbyshire as a Native. See
Wigginton (1999); Cheffings and Farrell (2005) and online amendments at the
JNCC website.
Explanation of Conservation Status Codes:
- A - Candidate Derbyshire Red Data Book plant. Unpublished list revised 2002 using BSBI criteria
- B - Derbyshire Red Data Book plant. Elkington & Willmot (1996) - list now superceded by "A"
- C - Mid-Derbyshire Biodiversity Action Plan species. Derbyshire Wildlife Trust (1997)
- D - UK Biodiversity Action Plan Species of Conservation Concern (original "long" list species)
- E - UK Biodiversity Action Plan Priority Species (original "short" and "middle" list species)
- F - Nationally Scarce (usually known in 16 to 100 GB hectads)
- G - Near Threatened (usually known in 15 or fewer GB hectads)
- H - British Red List – Vulnerable
- I - British Red List – Endangered
- J - British Red List – Critically Endangered
- K - British Red List – Extinct in the Wild
- L - British Red List – Extinct
- M - Bern Convention Appendix 1
- N - EC Directive Annexe(s) Vb
- O - EC Directive Annexe(s) IIb, IVb
- P - Wildlife & Countryside Act 1981 Schedule 8
- Q - EC Cites Annexe B
- R - EC Cites Annexe D
Distribution maps
Maps are available for all species for which grid reference data is available.
- Large white dots represent old records, collected prior to 1987
- Smaller black dots represent modern records, collected from 1987 to 2007
- A solid black dot in a larger white dot (bullseye) represents the presence of
a species both before and after the start of 1987.
Two levels of map details are available:
- Tetrad maps, where each dot represents the presence of one or more records anywhere in an area 2km x 2km in size (known as
tetrads)
- Hectad maps, where each dot represents the presence of one or more records anywhere in an area 10km x 10km in size (known as
hectads).
Map backgrounds show a combination of topographical relief and Natural Area boundaries in red. Relief is shown in five colour bands as follows:
- Yellow: Under 50m above sea level
- Green: 50-150m
- Blue: 150m-300m
- Light Purple: 300m to 500m
- Dark Purple: over 500m
For more information on Natural Areas follow this link :
English Nature - Natural areas
Map boundary data is Crown Copyright. All rights reserved. Reference 100024913 (2007).
Species accounts
Each account gives an overview of the plant, its county status, abundance and occurrence, especially
in relation to Natural Areas in Derbyshire. Locations are followed by Ordnance Survey
grid references, normally accurate to 1km square. Where locations are given
as specific examples they, or their grid
references, are presented in round brackets ( ). All other locations are given in non-standard brackets
[ ] to indicate they are purely examples of the geographic spread of a species; those chosen have no
particular significance above any others.
A statistics box contains information derived from Derby Museum's records database.
This includes the earliest and most recent year for which the species is known,
plus a total count of the records held. An analysis of grid square coverage
for past and modern records is given, based on monads, tetrads and hectads. (i.e. grid squares, that
are respectively 1km, 2km and 10kilometre in size). Information on
each plant's county status and conservation status is also given.
Maps and figures are based on data correct at September 2007. The accounts were originally drafted
by Dr Alan Willmot in 2003/4 and are now being updated in the light of many new records. Note that
because species and subspecies maps and accounts have not yet been merged, some care may be needed
when viewing or interpreting entries for certain taxa. Where the letters Xx appear in the species
accounts they indicate the start of italicisation of scientific names which will eventually be required
in the book form of the Flora of Derbyshire.