Huntingdonshire - Botanical Society of the British Isles

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vegetation. It is capable of forming a large and persistent seed bank and when peat was still dug commercially in the Fens, a show of Viola persicifolia often appeared in the wake of the peat diggers. During the 1960’s and 1970’s it appeared in abundance in various parts of Woodwalton Fen in the years following the extraction of fen carr and disturbance caused by excavating clay for waterproofing the banks around the SSSI. It is currently very rare at Woodwalton Fen but its decline might be reversible with appropriate management (Palmer, 2006a). Viola tricolor L. ssp. tricolor Wild Pansy National Status: Near Threatened County Status: Rare (2 tetrads) Site Grid Reference Last Record Field Farm TL122885 2004 (KW) Ongutain Manor, near TL120898 2004 (KW) Winwick TL1080 (tetrad) 2003 (TP) This species has always been rare in Huntingdonshire where it has been confused with some of the variants of Viola arvensis (Wells, 2003) and possibly with plants of hybrid origin also (hybrid swarms are abundant in parts of the Soke of Peterborough). Any future records should be supported by specimens or other appropriate evidence. Viola x ritschliana W. Becker Viola canina x Viola persicifolia National Status: Nationally Rare County Status: Rare (2 sites, 3 tetrads) Site Grid Reference Last Record Holme Fen SSSI TL198893 2006 (MM) Woodwalton Fen SSSI & SAC TL232835 TL227850 2006 (MM) 2006 (MM) This hybrid might arise as a result of crosses involving either Viola canina subspecies. It is often very vigorous, but so infertile that the possibility of back-crossing is very unlikely. This hybrid is closer to Viola persicifolia in habit, but its flowers resemble those of Viola canina (Stace, 2010). Viscum album L. Mistletoe National Status: Not scarce, not threatened County Status: Scarce (7 sites, 7 tetrads) Site Grid Reference Last Record Chesterton TL126942 2008 (DB) Elton, Greenhill Road TL122924 2000 (PT) Hemingford Abbots, Royal Oak Lane TL281709 2008 (LF) Hemingford Grey, St Ives Road TL306707 2008 (LF) Hemingford Grey, Victoria Terrace TL308707 2008 (PeS) 74
Hemingford Meadow TL307712 2007 (LF) Kimbolton Castle TL101675 2008 (LF) St Ives, field behind Bridge Street TL311705 2007 (LF) Needingworth, 18 High Street TL3472 (monad) 2010 (RP) Stonely TL107672 1999 (BD) Yaxley TL1892 2007 (MH) Widely but locally distributed on a range of different trees but particularly Tilia, Malus and Populus. It seems to be particularly frequent in villages along the River Great Ouse from Hemingford Grey eastwards. Vulpia unilateralis (L.) Stace Mat-grass National Status: Nationally Scarce, Waiting List County Status: Rare (1 site, 1 tetrad) Site Grid Reference Last Record Kimbolton Airfield TL108695 2008 (BD) This poorly known species is an early flowering spring annual. It grows in dry, open and very bare, often rubbly, places with a calcareous influence (Stewart et al. 1994). At Kimbolton Airfield it grows on thin soil that has developed over old concrete structures. 75
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Rare Plant Register for Huntingdons
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Hybrid taxa create another set of p
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7. References Cheffings, C.M. & Far
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occupy (in Huntingdonshire) a gener
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Hemingford Grey TL285701 2008 (LF)
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Always very rare in Huntingdonshire
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This attractive subspecies was firs
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A common sedge nationally but very
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Carex viridula Michaux ssp. brachyr
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Cerastium arvense L. Field Mouse-ea
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Chara canescens Desv. & Lois. Beard
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This species is widespread, but rar
Page 26 and 27: Dactylorhiza traunsteinerioides (Pu
Page 28 and 29: Dryopteris borreri (Newman) Newman
Page 30 and 31: Woodwalton Fen SSSI & SAC TL229833
Page 32 and 33: Fritillaria meleagris L. Fritillary
Page 34 and 35: Wansford Railway (disused) TL077496
Page 36 and 37: Hieracium umbellatum L. ssp. umbell
Page 38 and 39: countryside and waste places (Stewa
Page 40 and 41: Juncus compressus Jacq. Round-fruit
Page 42 and 43: Anacamptis morio at Upwood Meadows
Page 44 and 45: Myosurus minimus at Upwood Meadows
Page 46 and 47: Dactylorhiza traunsteinerioides at
Page 48 and 49: Luzula multiflora (Ehrh.) Lejeune s
Page 50 and 51: This rare species occurs in a range
Page 52 and 53: Neottia nidus-avis (L.) Rich. Bird
Page 54 and 55: Last recorded in 1846 from Somersha
Page 56 and 57: Pedicularis palustris L. Marsh Lous
Page 58 and 59: Waresley Wood SSSI TL263546 2009 (D
Page 60 and 61: Holme Lode Covert Middle Covert TL2
Page 62 and 63: Ranunculus parviflorus L. Small-flo
Page 64 and 65: Rubus percrispus D. Allen & R.D. Ra
Page 66 and 67: one-year old plants were introduced
Page 68 and 69: Monks Wood SSSI Upton Wood TL190795
Page 70 and 71: Teucrium scorodonia L. Wood Sage Na
Page 72 and 73: ealignment works, the installation
Page 74 and 75: Verbena officinalis L. Vervain Nati
Page 78 and 79: Appendix 1 Extinctions Many of the
Page 80 and 81: Appendix 2 Data Deficient Species A
Page 82 and 83: Appendix 3 Additional Species Not Y
Page 84 and 85: Lady’s Wood 6, 17, 53, 60, 66 Lit
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Huntingdonshire - Botanical Society of the British Isles

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