Rare Plant Register for Huntingdonshire - Botanical Society of the ...

Appendix 3 Additional Species Not Yet Assessed
Below follows a list of all other taxa that are currently being considered for inclusion in the
Register, under the County Scarce and County Rare categories. The data are currently
insufficient to determine whether these taxa meet the criteria or are just under-recorded.
Berula erecta possibly over-looked, more data needed
Callitriche obtusangula probably over-looked
Callitriche platycarpa few records but this is likely to be our commonest species
Centaurea debeauxii ssp. thuilleri may only be worthy of varietal status
Centaurea nigra sens. str. early flowering floodplain populations may lie here
Cerastium semidecandrum possibly over-looked, more data needed
Cirsium eriophorum probably in decline relative to historic baseline
Euphorbia lathyris dubiously native, needs further consideration
Euphrasia nemorosa probably in decline relative to historic baseline
Geranium lucidum probably a recent colonist derived from the horticultural trade.
Glyceria x pedicellata possibly over-looked
Hottonia palustris possibly declining, more searches need to be made of fenland drains
Lotus tenuis probably under-recorded in the Peterborough area
Nasturtium x sterile probably over-looked, cultivated for watercress
Persicaria hydropiper probably over-looked
Poa humilis more data needed
Potamogeton pusillus probably over-looked
Pyrus communis an archaeophyte but our trees are probably more recent escapes
Rumex maritimus probably in decline relative to historic baseline
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