BSBI long colour

The Threatened Plants Project

The Threatened Plants Project was a 5 year BSBI voluntary initiative to learn more about ‘threatened’ species covered by the new British Red List. We are focusing on widespread species that have been classified as threatened for the first time, mainly because the 2002 Atlas showed them to have undergone rapid declines. For most we have very little information on their distribution, ecology and reasons for decline.


1. To collate detailed distribution records so that we can produce better maps for each species;

2. To carry out detailed surveys of a random sample of populations across Great Britain and Ireland so we can improve or understanding of their ecology and reasons for decline.

How can I get involved?

2012 was the final full year of the five year project. We have begun to digitise, analyse and write up the results. Meantime there is an opportunity for botanical volunteers, whether members or not, to do some additional ‘mopping-up’ field survey work in 2013. The TPP guidance and forms are available below.

If you’d like to help with this mopping up exercise, please contact those who are coordinating volunteer effort and liaising with Recorders. They are Eric Meek in Scotland, Paul Green in Wales, Bob Ellis in England, and Maria Long in Ireland. Please send the appropriate coordinator a note of your availability and any geographical or other preferences.

For further details about the Threatened Plant Project generally, please contact Kevin Walker.


Instructions for the survey

  • >> Letter to v.c. recorders
  • >> Instructions
  • >> Recording card (pdf)
  • >> Recording card (Word)
  • >> Selected sites 2012 (xls)

Here are some files from previous years’ surveys...

  • >> Juniper recording card
  • >> Selected sites 2010 (xls)
  • >> Selected sites 2009 (xls)
  • >> Selected sites 2008 (xls)





What do the results tell us?

The information collected for this project allows us to do much more than plot dots on maps. Surveyors record all sorts of additional information that is vital to improving our understanding of their ecological and management needs as well as responses to land use and environmental change. The recording form opposite asks for information on population sizes, extent, habitats, associated species, as well as management and threats. A novel feature of this project is the submission of negative (null) records, as for many species these are often even more informative than positive finds, especially where we are struggling to understand the reasons for decline. Good examples so far include upland species such as Crepis mollis and Sibbaldia procumbens which may be over-looked rather than declining.

A baseline for the future

The sample survey also provides a baseline from which future population changes can be assessed and in doing so help us to better understand environmental changes (e.g. habitat  loss, eutrophication, climate change). More generally the project is also helping to refine the BSBI’s approach to the monitoring rare and threatened species.

How will the results be used?

Analyses of the results will be used to produce mini-dossiers on each species providing assessments of the ecology, habitats and recent trends in the light of information gathered. These will be made freely available on the BSBI website and will be used as the basis of accounts covering all threatened species planned to coincide with revision of the British Red List planned for around 2016/17. By making this information available much earlier than this we will hopefully stimulate further surveys and research on these species as well as informing improved conservation protection and management.

Results so far

>> 2010 report

Over the first two years of the project our recorders surveyed nearly 1500 populations of the 20 target species across Britain and Ireland, as well as contributing 1000s of “new records”. The map for Astragalus danicus is illustrative of just how good the coverage has been, with recorders managing to survey populations across the entire range, even isolated populations on the west coast of Scotland and Ireland.



Alchemilla wichurae

For those surveying A. wichurae sites, this crib sheet should help in identification.

Alchemilla wichurae

Baldellia ranunculoides

For those surveying Baldellia sites, here is a key to the subspecies.

species covered


  • Alchemilla wichurae
  • Anacamptis morio (Orchis morio)
  • Bupleurum tenuissimum
  • Fumaria parviflora
  • Hypochaeris glabra
  • Orchis anthropophora (Aceras anthropophorum)
  • Persicaria minor
  • Ranunculus arvensis
  • Tephroseris integrifolia subsp. integrifolia
  • Vicia parviflora


  • Baldellia ranunculoides
  • Cicendia filiformis
  • Cuscuta epithymum
  • Galium pumilum
  • Juncus compressus
  • Orchis ustulata
  • Pseudorchis albida
  • Sedum villosum
  • Silene conica
  • Torilis arvensis


  • Chrysanthemum segetum
  • Hordeum marinum
  • Juniperus communis*
  • Melittis melissophyllum
  • Meum athamanticum
  • Herminium monorchis
  • Polystichum lonchitis
  • Sibbaldia procumbens
  • Sium latifolium
  • Viola lactea

* lowland populations in England only.


  • Carex ericetorum
  • Cephalanthera longifolia
  • Coeloglossum viride
  • Dianthus deltoides
  • Fallopia dumetorum
  • Gnaphalium sylvaticu
  • Groenlandia densa
  • Melampyrum cristatum
  • Oenanthe fistulosa
  • Vicia orobus


  • Astragalus danicus
  • Blysmus compressus
  • Campanula patula
  • Crepis mollis
  • Gentianella campestris
  • Monotropa hypopitys
  • Ophrys insectifera
  • Pyrola media
  • Scleranthus annuus
  • Stellaria palustris