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

Isolepis setacea (L.) R.Br.
Bristle Club-rush
National Status: Not scarce, not threatened County Status: Rare (1 site, 2 tetrads)
Woodwalton Fen SSSI & SAC:
Compartment 42/43
Compartment 44
Compartment 45
Compartment 54
Compartment 61
Compartment 77
Site Grid Reference Last Record
44
TL229850 (centroid)
TL231850 (centroid)
TL233850 (centroid)
TL22638437
TL228842
TL22968375
2010 (MM)
2010 (MM)
2010 (MM)
2010 (MM)
2009 (MM)
2008 (MM)
This is a species of open, damp, generally acidic sites [local surface acidification in
Huntingdonshire], especially those subject to winter flooding (Jermy et al. 2007). It is
characteristic of cattle grazed and poached, along with other periodically disturbed, habitats.
Isolepis fluitans (L.) R. Br.
Floating Club-rush
National Status: Not scarce, not threatened County Status: Rare (2 sites, 2 tetrads)
Site Grid Reference Last Record
Pidley Fen TL350805 1996 (TB)
Somersham, High North Fen TL374813 1999 (TW & SW)
This species is local throughout Britain, being predominately western in distribution. It is only
of scattered distribution in central and eastern England, where it has been lost to drainage
(Jermy et al. 2007) and eutrophication.
Juncus bulbosus L.
Bulbous Rush
National Status: Not scarce, not threatened County Status: Rare (3 sites, 4 tetrads)
Holme Fen SSSI:
Compartment 3
Compartment 31
Site Grid Reference Last Record
TL1989
TL2088
2006 (MM)
2006 (MM)
Pidley Fen TL345804 1996 (TB)
Woodwalton Fen SSSI & SAC,
Compartment 30
A rare species of fenland ditches and drains.
TL233856 (centroid) 2010 (MM)