Huntingdonshire - Botanical Society of the British Isles

Embankments, Peterborough (CP). It is conceivable that it might also occur on the VC31 side
of the River or in connected watercourses, but access is poor and it has not been possible to
investigate this further.
Potamogeton friesii Rupr.
Flat-stalked Pondweed
National Status: Nationally Scarce, Near
Threatened
County Status: Rare (1 site, 1 tetrad)
Site Grid Reference Last Record
Warboys Turf Fen TL3282 2001 (DWr)
A species of (usually) calcareous ditches, drains, canals and rivers. It can tolerate some
eutrophication (Preston, 1995) but is still vulnerable to declining water quality.
Potamogeton x angustifolius J. Presl.
Long-leaved Pondweed
National Status: Not scarce, not threatened
County Status: Rare (1 site, 1 tetrad)
Site Grid Reference Last Record
Warboys Turf Fen TL3282 2001 (DWr)
In Huntingdonshire and Cambridgeshire this is typically a species of fenland drains, including
drains flowing through intensive arable farmland. It may be under-recorded but is very unlikely
to prove common.
Potamogeton x fluitans Roth.
Potamogeton lucens x Potamogeton natans
National Status: Nationally Rare,
Vulnerable
County Status: Rare (1 site, 1 tetrad)
Site Grid Reference Last Record
Woodwalton Fen SSSI & SAC TL234852 2005 (MM)
This rare hybrid is otherwise only known from localities in Dorset, Hampshire and Norfolk. It is
normally sterile and does not produce turions; as such, it is dependent on its vigorous
rhizomes for its long-term persistence at a site (Preston, 1995).
Potentilla anglica Laichard
Trailing Tormentil
National Status: Not scarce, not threatened
County Status: Rare (3 sites, 4 tetrads)
Site Grid Reference Last Record
Brampton Wood SSSI
TL17266974
2009 (DB)
TL18327042
2008 (DB)
Holme Fen SSSI:
57