Huntingdonshire - Botanical Society of the British Isles

Waresley Wood SSSI TL263546 2009 (DB)
This fern has always been rare in Huntingdonshire and only a few plants are known at each
site, growing on the banks of small woodland streams. The only other site where it has been
recorded is Holme Fen and it was last seen there in 1846.
Populus nigra L. ssp. betulifolia (Pursh.) Wettst.
Black Poplar
National Status: Not scarce, not threatened
County Status: Scarce (7 sites, 7 tetrads)
Site Grid Reference Last Record
A141, between Wyton and Oldhurst TL2875 2001 (BL)
Brampton TL205725 1994 (GE)
Catworth TL085742 1994 (GE)
Ellington, Whitleather Lodge Farm (on
parish boundary)
TL16157372
2009 (DB)
Hartford Hill Farm TL271738 1990 (TW)
Houghton to Wyton TL266749 1992 (TW)
Kings Ripton/Broughton parish boundary TL265778 1990 (TW)
An uncommon tree that typically only occurs as singletons or in very low numbers at any one
location.
Potamogeton coloratus Hornem.
Fen Pondweed
National Status: Nationally Scarce, not
threatened
County Status: Rare (4 sites, 4 tetrads)
Site Grid Reference Last Record
Beeby’s Pit (CP) TL189935 1999 (NS)
Farcet, Crown Lakes Country Park TL193942 2002 (NM)
Norman Cross Middle Pit TL162907 2009 (DB)
Orton Pit SSSI (CP) TL1593 2005 (DB)
This is a species of shallow calcareous water, usually less than 1m deep. In Britain, it is
predominantly a species of eastern England and has a broadly similar distribution to that of
some other species of calcareous wetlands, including species covered by the Register e.g.
Stellaria palustris and Lathyrus palustris (Preston, 1995).
Potamogeton compressus L.
Grass-wrack Pondweed
National Status: Nationally Scarce,
Endangered, BAP
County Status: No recent records
There have been no records for this species since 1974 when it was reported from Borough
Fen. However, a strong population is known from the VC29 side of the River Nene at The
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