Rare Plant Register for Huntingdonshire - Botanical Society of the ...
Rare Plant Register for Huntingdonshire - Botanical Society of the ...
Rare Plant Register for Huntingdonshire - Botanical Society of the ...
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This is a free-floating species that typically occurs in still or slow-flowing neutral to base-rich<br />
waters. It is undoubtedly a native <strong>of</strong> <strong>Huntingdonshire</strong>, particularly in <strong>the</strong> Fens, but it is also a<br />
popular horticultural plant and some colonies have probably arisen as garden escapes and<br />
throw-outs. Formerly more widespread in <strong>the</strong> Fens, its scarcity today is probably <strong>the</strong> result <strong>of</strong><br />
a long-standing decline that started in <strong>the</strong> 19 th Century when <strong>the</strong> Fens started to be drained<br />
and converted to arable farmland.<br />
Hydrocotyle vulgaris L.<br />
Marsh Pennywort<br />
National Status: Not scarce, not threatened County Status: <strong>Rare</strong> (3 sites, 5 tetrads)<br />
Site Grid Reference Last Record<br />
Holme Fen SSSI TL197893<br />
42<br />
TL217886<br />
2008 (DB)<br />
2009 (DB)<br />
Norman Cross Pits, Middle Pit TL162907 2010 (NC)<br />
Woodwalton Fen SSSI & SAC TL234851<br />
TL22878354<br />
2010 (DB)<br />
2010 (DB)<br />
Historically, this species was considered to be common in our fen dykes (Wells, 2003). This is<br />
no longer <strong>the</strong> case and today it is only known from calcareous fen vegetation at Woodwalton<br />
Fen and Norman Cross, and in damp places on <strong>the</strong> more acidic fen peats <strong>of</strong> Holme Fen.<br />
Hyoscyamus niger L.<br />
Henbane<br />
National Status: Vulnerable County Status: <strong>Rare</strong> (2 sites, 2 tetrads)<br />
Site Grid Reference Last Record<br />
Church End, St Andrew’s Church TL209822 2004 (JC)<br />
Grafham, south side <strong>of</strong> West Wood TL151697 2008 (DB)<br />
The decline in this species has been as a result <strong>of</strong> <strong>the</strong> loss <strong>of</strong> suitable habitats to<br />
development, <strong>the</strong> intensification <strong>of</strong> farming practices and <strong>the</strong> general desire to ‘tidy-up’ <strong>the</strong><br />
countryside and waste places (Stewart et al. 1994). Fortunately, this species can <strong>for</strong>m a<br />
persistent seed bank and can reappear when conditions become more suitable.<br />
Hypericum humifusum L.<br />
Trailing St John’s-wort<br />
National Status: Not scarce, not threatened County Status: <strong>Rare</strong> (3 sites, 5 tetrads)<br />
Site Grid Reference Last Record<br />
Brampton Wood SSSI TL18306994<br />
TL17527014<br />
TL18417047<br />
2011 (DB)<br />
2009 (DB)<br />
2008 (DB)<br />
Orton Pit SSSI, Jones’s Covert (CP) TL1693 1997 (TW)<br />
Little Paxton Wood SSSI TL1763 1996 (TW)
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