Huntingdonshire - Botanical Society of the British Isles

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ealignment works, the installation of utilities and inappropriate management (Stewart et al. 1994). Trifolium striatum L. Knotted Clover National Status: Not scarce, not threatened County Status: Rare (2 sites, 2 tetrads) Site Grid Reference Last Record Conington ‘Dump’ TL202840 2009 (SL) Ferry Meadows Country Park (CP) TL145975 1998 (TD) Paxton Pits Nature Reserve TL199627 2000 (RE) This species shows an affinity for old gravel pit complexes where the shallow, mineral-rich soils and sparse vegetation provide suitable niches. Triglochin palustre L. Marsh Arrowgrass National Status: Not scarce, not threatened County Status: Rare (1 site, 1 tetrad) Site Grid Reference Last Record St Neots Common SSSI, Lammas Meadow TL181612 2009 (DB) This is a very rare species in Huntingdonshire. The only other known site was a flood meadow at Water Newton where it was last recorded in 1968. Urtica dioica L. ssp. galeopsifolia (Wierzb. ex Opiz) Chrtek Fen Nettle National Status: Data Deficient County Status: Rare (2 sites, 4 tetrads) Holme Fen SSSI Woodwalton Fen SSSI & SAC Site Grid Reference Last Record TL1989 TL2088 TL2282 (tetrad) TL2384 2007 (DB) 2009 (DB) 2007 (DB) 2007 (DB) This is the stingless taxon of fens and river banks. Visitors to Holme and Woodwalton Fen will have found it a refreshing change to wade through beds of nettle unmolested. Plants at Holme Fen are morphologically very variable, with widespread stingless forms that otherwise resemble ssp. dioica. These may indicate the presence of a hybrid swarm resulting from the mixing of the two subspecies as the fen as dried out over time. More research is needed. 70
Utricularia vulgaris L. Greater Bladderwort National Status: Not scarce, not threatened County Status: Rare (1 site, 1 tetrad) Site Grid Reference Last Record Woodwalton Fen SSSI & SAC TL231843 2009 (DB) This is probably also the identity of the luxuriant populations present in the dykes of Darlows Farm (Great Fen Project), but I am yet to see flowering material. Valeriana officinalis L. ssp. collina (Wallr.) Nyman Common Valerian National Status: Data Deficient County Status: Data Deficient Site Grid Reference Last Record Monks Wood SSSI TL20218012 2009 (DB) Ssp. collina is long established and very distinctive but was largely forgotten when the recording of infraspecific taxa fell out of fashion. It is very poorly known but the publication of descriptions in Stace (2010) and Sell & Murrell (2006) should hopefully start to rectify this. Wells (2003) did not segregate the subspecies but identifies that the species occurs on woodland rides as well as in wetlands. Our woodland plants are undoubtedly attributable to ssp. collina, which is typical of boulder clay woodlands and limestone grassland in neighbouring VC32. While good data is lacking, having surveyed this subspecies rigorously for the last three years, I consider that in Huntingdonshire it will have a distribution comparable to Dipsacus pilosus and is probably at least as scarce if not more so. Unlike that species it appears to be intolerant of shade and has probably declined extensively as a result of poor woodland management. I could only find it on one ride in Monks Wood where it was locally abundant for no more than 20m. Woodland managers need to have their attention drawn to this subspecies as the distribution maps for the species do not adequately reflect the more restricted distribution of the subspecies (although they are probably representative of the distribution of our other subspecies, ssp. sambucifolia). Valerianella carinata Lois. Keel-fruited Cornsalad National Status: Not scarce, not threatened County Status: Rare (3 sites, 3 tetrads) Site Grid Reference Last Record Conington, roadside bank TL194869 2005 (WM) Huntingdon TL234718 2005 (KW) Peterborough, Woodbine Street (CP) TL190975 2006 (NC) Perhaps overlooked or only a recent colonist. There are indications that it may be increasing nationally (Stace, 2010). 71
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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
Page 22 and 23: Chara canescens Desv. & Lois. Beard
Page 24 and 25: 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 74 and 75: Verbena officinalis L. Vervain Nati
Page 76 and 77: vegetation. It is capable of formin
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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