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The following list excludes planted trees and shrubs, except where those species are naturalised (ie surviving for several years from self-sown seed). All species are listed in alphabetical order; alien species are listed at the bottom, and hybrids are included where their populations are considered to be self-supporting.

Status codes:
AN: Notable species in the former county of Avon (as defined by Bristol Regional Environmental Records Centre)
NS: Nationally Scarce species
LL: Species on Biodiversity Long List

List compiled by Wessex Ecological Consultancy.

 MAIN LIST

  Acer campestreField maple
  Acer pseudoplatanusSycamore
  Achillea millefoliumYarrow
  Adoxa moschatellinaMoschatelFrequent in hedges on east shore
  Aegopodium podagrariaGround elder
  Agrimonia eupatoriaAgrimony
  Agrostis stoloniferaCreeping bent
  Agrostis tenuisCommon bent
  Ajuga reptansBugle
  Alchemilla filicaulisLady’s mantleAN very rare in unimproved grassland
  Alisma plantago-aquaticaWater-plantain
  Alliaria petiolataJack-by-the-hedge
  Allium ursinumRamsons
  Allium vinealeCrow garlic
  Alnus glutinosaAlder
  Alnus incanaGrey alder
  Alopecurus geniculatusCreeping foxtail
  Alopecurus pratensisMeadow foxtail
  Anagallis arvensisScarlet pimpernel
  Angelica sylvestrisWild angelica
  Anisantha sterilisSterile brome
  Anthoxanthum odoratumSweet vernal grass
  Anthriscus sylvestrisCow parsley
  Apium nodiflorumFool's water-cress
  Arctium minusLesser burdock
  Arenaria serpyllifoliaThyme-leaved sandwortRecorded for first time in 2003
  Armoracia rusticanaHorse radishAbundant in shallow water
  Arrhenatherum elatiusFalse oat-grass
  Artemisia biennisSlender mugwortAN an American species, possibly naturally introduced by vagrant birds
  Artemisia vulgarisCommon mugwort
  Arum maculatumCuckoo-pint
  Atriplex patulaCommon orache
  Atriplex prostrataSpear-leaved orache
  Barabarea intermediaMedium-flowered winter-cress
  Barbarea vulgarisCommon winter-cress
  Bellis perennisDaisy
  Bidens cernuaNodding bur-marigoldAN very rare on east shore
  Bidens trifidaTrifid bur-marigoldAN abundant when water levels drop
  Bolboschoenus maritimusSea club-rushAN several large patches, eg at Moreton and Villice
  Brachypodium sylvaticumWood false-brome
  Brassica nigraBlack mustard
  Briza mediaQuaking grass
  Bromopsis erectaUpright brome
  Bromopsis ramosaHairy brome
  Bromus lepidusSlender soft bromeAN
  Bromus mollisSoft brome
  Bromus racemosusSmooth bromeAN
  Bryonia dioicaWhite bryony
  Buddleia davidiiBuddleiaOne found on the Parkland in 2005
  Butomus umbellatusFlowering rushAN uncommon - a few patches dotted around the lake
  Callitriche platycarpaVarious-leaved water starwort
  Callitriche stagnalisCommon water starwort
  Caltha palustrisMarsh marigoldAN rare, most frequent at Stratford
  Calystegia sepiumHedge bindweed
  Campanula tracheliumNettle-leaved bellflowerAN rare at Hollow Brook
  Capsella bursa-pastorisShepherd's purse
  Cardamine flexuosaWavy bittercress
  Cardamine hirsutaHairy bittercress
  Cardamine pratensisCuckoo flower
  Carex acutiformisLesser pond sedgeAN forming large patches
  Carex caryophylleaSpring sedge
  Carex distichaBrown sedgeAN in marshy vegetation, increasing
  Carex divulsaGrey sedge
  Carex flaccaGlaucous sedge
  Carex hirtaHairy sedge
  Carex otrubaeFalse fox sedge
  Carex ovalisOval sedgeAN much less frequent thandisticha
  Carex paniceaCarnation sedgeAN
  Carex pendulaPendulous sedge
  Carex remotaRemote sedge
  Carex ripariaGreat pond sedge
  Carex spicataSpiked sedge
  Carex sylvaticaWood sedge
  Catapodium rigidumFern grassAN
  Centaurea cyaneaCornflowerAN NS - once on a new island on Herriott's Pool in 1985 only
  Centaurea nigraBlack knapweed
  Centaurea scabiosaGreater knapweed
  Centaurium erythraeaCentaury
  Cerastium fontanumCommon mouse-ear chickweed
  Cerastium glomeratumClustered mouse-ear chickweed
  Cerastium tomentosumSnow-in-summer
  Ceratophyllum demersumRigid hornwortAN
  Chaenorhinum minusSmall toadflaxNew in 2006 - Woodford Car-park
  Chaerophyllum temulentumRough chervil
  Chenopodium albumFat hen
  Chenopodium ficifoliumFig-leaved goosefootAN
  Chenopodium polyspermumMany-seeded goosefootAN
  Chenopodium rubrumRed goosefoot
  Chr'splenium oppositifoliumOpposite-leaved Golden-saxifrageFound at Herriott's in 2007
  Cichorium intybusChicory
  Circaea lutetianaEnchanters nightshade
  Cirsium arvenseCreeping thistle
  Cirsium eriophorumGreat woolly thistle
  Cirsium palustreMarsh thistle
  Cirsium vulgareSpear thistle
  Clematis vitalbaOld man's-beard
  Clinopodium vulgareWild basil
  Cochlearia danicaDanish scurvy grassAlong the A368 at Herriott's Bridge
  Colchicum autumnaleMeadow saffronAN Denny Island only
  Conium maculatumHemlock
  Conopodium majusPignut
  Convolvulus arvensisField bindweed
  Cornus sanguineaDogwood
  Coronopus squamatusSwine-cress
  Corylus avellanaHazel
  Crataegus monogynaHawthorn
  Crepis capillarisSmooth hawk's-beard
  Crepis setosaBristly hawk’s-beardNaturalised at Herriott’s Bridge and Heron's Green Bay
  Crepis vesicariaRough hawk's-beard
  Cymbalaria muralisIvy-leaved toadflax
  Cynosurus cristatusCrested dogstail
  Dactylis glomerataCocksfoot
  Dactylorhiza fuchsiiCommon spotted orchidScattered around the Parkland
  Dactylorhiza maculataHeath spotted orchidA big patch on the Parkland
  Dactylorhiza praetermissaSouthern marsh orchidRare, Moreton Bank and Wick Green Point
  Dactylorhiza x grandisHybrid marsh orchidMoreton
  Danthonia decumbensHeath grassAN rare around Parkland
  Daphne laureolaSpurge-laurelRecorded for first time in 2003 behind the sailing club
  Daucus carotaWild carrot
  Deschampsia caespitosaTufted hairgrass
  Dipsacus fullonumTeasel
  Dryopteris dilatataBroad buckler fern
  Dryopteris filix-masMale fern
  Eleocharis palustrisCommon spike rush
  Elodea canadensisCanadian pondweed
  Elodea nuttalliiNuttall’s pondweed
  Elymus caninaBearded couch
  Elytrigea repensCommon couch
  Epilobium angustifoliumRosebay willowherb
  Epilobium hirsutumGreat willowherb
  Epilobium montanumBroad-leaved willowherb
  Epilobium obscurumShort-fruited willowherbAN
  Epilobium roseumPale willowherbAN
  Epilobium tetragonumSquare-stemmed willowherb
  Epipactis helleborineBroad-leaved HelleborineSeveral 'purpurea' plants found on Whalley Bank in 2006
  Equisetum arvenseField horsetail
  Equisetum fluviatileWater horsetail
  Equisetum palustreMarsh horsetail
  Equisetum telmateiaGreater horsetail
  Erodium cicutariumStorksbillAN
  Erophila vernaSpring whitlow grass
  Erysimum cheiranthoidesTreacle mustardAN Sutton Wick
  Euonymus europaeusSpindle
  Eupatorium cannabinumHemp agrimony
  Euphorbia amygdaloidesWood spurge
  Euphorbia helioscopaSun spurge
  Euphorbia peplusPetty spurge
  Festuca arundinaceaTall fescue
  Festuca giganteaGiant fescue
  Festuca pratensisMeadow fescue
  Festuca ovinaSheep’s fescue
  Festuca rubraRed fescue
  Filipendula ulmariaMeadow sweet
  Fraxinus excelsiorAsh
  Galanthus nivalisSnowdropAN Hollow Brook, River Chew
  Galeopsis tetrahitCommon hemp-nettleAN
  Galium aparineCleavers
  Galium mollugoHedgerow bedstraw
  Galium palustreMarsh bedstraw
  Galium uliginosumFen bedstrawAN
  Galium verumLadies bedstraw
  Genista tinctoriaDyers greenweedAN grassland around Parkland
  Geranium dissectumCut-leaved cranesbill
  Geranium molleDovesfoot cranesbill
  Geranium pratenseMeadow cranesbill
  Geranium robertianumHerb robert
  Geum rivaleWater avensAN Herriott’s Pool
  Geum urbanumWood avens
  Glechoma hederaceaGround ivy
  Glyceria fluitansFlote grass
  Glyceria plicataFlote grass
  Gnaphalium uliginosumMarsh cudweedAN abundant as water drops
  Groenlandia densaOpposite-leaved pondweedAN rare and sporadic, Heron's Green Bay
  Hedera helixIvy
  Heracleum sphondylliumHogweed
  Hippuris vulgarisMarestailAN large patch in Villice
  Holcus lanatusYorkshire fog
  Hordeum murinumWall barley
  Hordeum secalinumMeadow barley
  Hyacinthoides non-scriptusBluebellAN LL
  Hypericum hirsutumHairy St John's wort
  Hypericum perforatumPerforate St John's wort
  Hypericum tetrapterumSquare-stemmed St John's wort
  Hypochaeris radicataCommon cat's ear
  Ilex aquifoliumHolly
  Impatiens glanduliferaHimalayan balsamFound growing quite commonly in Heron's Green (2007)
  Iris pseudacorusYellow flag
  Isolepis setaceaBristle club-rushAN
  Juncus acutiflorusSharp-flowered rushAN
  Juncus articulatusJointed rush
  Juncus bufoniusToad rush
  Juncus compressusRound-fruited rushAN Twycross, Stratford etc - spreading around lake
  Juncus conglomeratusClustered rushAN
  Juncus effususSoft rush
  Juncus inflexusHard rush
  Kickxia elatineSharp-leaved fluellinAN
  Knautia arvensisField scabious
  Lactuca serriolaPrickly lettuceRecorded for first time in 2003
  Lagarosiphon majorCurly waterweedRecorded for first time in 2003
  Lamium albumWhite dead-nettle
  Lamium purpureumRed dead-nettle
  Lapsana communisNipplewort
  Lathryus linifoliusBitter vetchAN rare at Heron’s Green Bay
  Lathyrus nissoliaGrass vetchlingAN fairly frequent in grassand
  Lathyrus pratensisMeadow vetchling
  Lemna minorCommon duckweed
  Lemna trisulcaIvy-leaved duckweedAN
  Leontodon autumnalisAutumnal hawkbit
  Leontodon saxatilisLesser hawkbit
  Leucanthemum vulgareOx-eye daisy
  Ligustrum vulgareWild privet
  Limosella aquaticaMudwortAN NS Found at Moreton in 1995. Submerged most years
  Linaria purpureaPurple toadflax
  Linaria vulgarisCommon toadflax
  Linum catharticumPurging flax
  Lolium perennePerennial rye-grass
  Lonicera periclymenumHoneysuckle
  Lotus corniculatusBird's-foot trefoil
  Lotus pedunculatusGreater bird's-foot trefoil
  Luzula campestrisField woodrush
  Luzula pilosaHairy woodrushAN hedges on east shore
  Lycopus europaeusGipsywort
  Lysimachia nummulariaCreeping jenny
  Lythrum salicariaPurple loosestrife
  Malus domestica Apple
  Malva moschataMusk mallow
  Malva sylvestrisCommon mallow
  Matricaria discoideaPineappleweed
  Matricaria inodorataScentless mayweed
  Medicago lupulinaBlack medick
  Medicago sativaLucerne
  Mentha aquaticaWater mint
  Mentha arvensisCorn mintAN
  Mercurialis perennisDog's mercury
  Myosotis arvensisField forget-me-not
  Myosotis discolorChanging forget-me-notAN
  Myosotis scorpioidesWater forget-me-not
  Myosoton aquaticumWater chickweedAN
  Myriophyllum spicatumSpiked water milfoilAN
  Nasturtium officinalisWater-cress
  Nigella damasceneLove-in-the-mist
  Nitellopsis obtusaStarry stonewortA Red Data Book species - found in 2004
  Oenanthe crocataHemlock water dropwort
  Oenanthe pimpinelloidesCorky-fruited water dropwortAN spreading in grasslands
  Oenothera glaziovianaLarge-flowered evening primrose
  Ononis repensCreeping restharrow
  Ononis spinosaSpiny restharrowAN
  Ophioglossum vulgatumAdder's tongue fernAN rare on Parkland
  Ophrys apiferaBee orchidAN rare by Parkland
  Orchis morioGreen-winged orchidAN huge colony on Parkland
  Papaver dubiumLong-headed poppy
  Papaver rhoeasField poppy
  Persicaria amphibiaAmphibious bistortForming large patches
  Persicaria hydropiperWater pepperAN
  Persicaria lapithifoliaPale persicaria
  Persicaria maculosaRedshanks
  Petasites fragransWinter heliotrope
  Petasites hybridusButterburAN Stratford
  Phalaris arundinaceaReed canary-grass
  Phleum bertoloniiSmall timothy
  Phleum pratenseTimothy
  Phragmites australisCommon reed
  Phyllitis scolopendriumHart's tongue fern
  Picris echioidesBristly oxtongue
  Pilosella officinarumMouse-ear hawkweed
  Pimpinella saxifragaBurnet saxifrage
  Plantago lanceolataRibwort plantain
  Plantago majorRatstail plantain
  Plantago mediaHoary plantain
  Poa annuaAnnual meadow-grass
  Poa humilisSpreading meadow-grassAN
  Poa pratensisSmooth meadow-grass
  Poa trivialisRough meadow-grass
  Polygonum aviculareKnotgrass
  Polygonum rurivagumKnotgrass
  Polystichum aculeatumHard shield-fernAN
  Polystichum setiferumSoft shield-fern
  Potamogeton berchtoldiiSmall pondweedAN most frequent member of genus
  Potamogeton crispusCurled pondweedAN
  Potamogeton pectinatusFennel pondweedAN
  Potamogeton pusillusLesser pondweedAN
  Potentilla anserinaSilverweed
  Potentilla erectaTormentil
  Potentilla reptansCreeping cinquefoil
  Potentilla sterilisBarren strawberry
  Primula x polyanthaFalse oxlipFine clump at Stratford
  Primula verisCowslip
  Primula vulgarisPrimrose
  Prunella vulgarisSelfheal
  Prunus spinosaBlackthorn
  Pulicaria dysentericaFleabane
  Quercus roburPedunculate oak
  Ranunculus acrisMeadow buttercup
  Ranunculus aquatilisWater crowfootAN
  Ranunculus bulbosusBulbous buttercup
  Ranunculus circinatusFan-leaved water-crowfootLoads growing in the new ponds at Nunnery
  Ranunculus ficariaLesser celandine
  Ranunculus repensCreeping buttercup
  Ranunculus sceleratusCelery-leaved buttercup
  Raphanus raphanistrumWild radish
  Ribes nigrumBlack currantAN
  Rorippa palustrisMarsh yellow-cressAN
  Rorippa sylvestrisCreeping yellow-cressAN
  Rosa arvensisField rose
  Rosa caninaDog rose
  Rosa stylosaShort-styled field rose
  Rubus caesiusDewberry
  Rubus fruticosus aggBramble
  Rumex acetosaSorrel
  Rumex conglomeratusClustered dock
  Rumex crispusCurled dock
  Rumex maritimusGolden dockAN scattered around lake, flowering only in dry years
  Rumex obtusifoliusBroad-leaved dock
  Rumex sanguineusBloody dock
  Sagina apetalaUpright pearlwortAN
  Sagina procumbensProcumbent pearlwort
  Salix albaWhite willow
  Salix capreaGoat willow
  Salix cinereaSallow
  Salix fragilisCrack willow
  Salix triandraAlmond willowAN rare in main reeds
  Salix viminalisOsier
  Sambucus nigraElder
  Samolus valerandiBrookweedAN rare, Herriott’s Pool
  Schoenoplectus lacustrisBulrushAN
  Scrophularia auriculataWater figwort
  Sedum acreBiting stonecrop
  Senecio aquaticusMarsh ragwortAN
  Senecio erucifoliusDowny ragwort
  Senecio jacobaeaCommon ragwort
  Senecio squalidusOxford ragwort
  Senecio vulgarisGroundsel
  Serratula tinctoriaSaw-wortAN rare, Parkland
  Silaum silausPepper saxifrageAN
  Silene dioicaRed campion
  Sinapis arvensisCharlock
  Sison amomumStone parsley
  Sisymbrium officinaleHedge mustard
  Solanum dulcamaraWoody nightshade
  Solanum nigrumBlack nightshade
  Sonchus arvensisField sow-thistle
  Sonchus asperPrickly sow-thistle
  Sonchus oleraceusSmooth sow-thistle
  Sparganium erectumBranched bur-reed
  Stachys officinalisBetony
  Stachys palustrisMarsh woundwort
  Stachys sylvaticaHedgerow woundwort
  Stellaria gramineaLesser stitchwort
  Stellaria holosteaGreater stitchwort
  Stellaria mediaChickweed
  Succisa pratensisDevil's-bit scabious
  Symphytum officinaleComfrey
  Tamus communisBlack bryony
  Taraxacum vulgaris aggDandelion
  Thlaspi arvensisField penny-cressAN
  Torilis japonicaUpright hedge parsley
  Tragopogon pratensisGoat's-beard
  Trifolium dubiumLesser trefoil
  Trifolium fragiferumStrawberry cloverAN rare Parkland and Moreton
  Trifolium mediumZigzag cloverAN widespread in grasslands, especially around Villice
  Trifolium pratensisRed clover
  Trifolium repensWhite clover
  Tripleurospermum inodorumScentless mayweed
  Trisetum flavescensYellow oat-grass
  Tussilago farfaraColtsfoot
  Typha latifoliaGreater reedmace
  Ulex europaeusCommon gorseSelf-seeded on the Nunnery car-park 'mound'
  Ulmus glabraWych elm
  Ulmus proceraEnglish elm
  Urtica dioicaNettle
  Valerianella locustaCornsaladAN
  Verbascum thapsus Greater mullein New in 2004
  Verbena officinalis Vervain New in 2011
  Veronica beccabungaBrooklime
  Veronica catentataPink water-speedwellAN
  Veronica chamaedrysGermander speedwell
  Veronica hederifoliaIvy-leaved speedwell
  Veronica persicaCommon field-speedwell
  Veronica politaGrey field-speedwell
  Veronica serpyllifoliaThyme-leaved speedwell
  Viburnum lantanaWayfaring tree
  Viburnum opulusGuelder rose
  Vicia bithynicaBithynian vetchAN NS Was at Parkland
  Vicia craccaTufted vetch
  Vicia hirsutaHairy tare
  Vicia sativaCommon vetch
  Vicia sepiumBush vetch
  Vicia tetraspermumFour-leaved tareAN
  Viola odorataSweet violet
  Viola reichanbachianaEarly dog violet
  Viola rivinianaCommon dog violet
  Viscum albumMistletoe

 BIRD SEED ALIENS

The following species have been recorded where birds are fed on the causeways at Heron's Green Bay and Herriott's Bridge.  Most are sporadic in appearance but some have become established for a few years. Autumn until the first frosts after a hot summer is the best time to look for these plants - new species are recorded in most years.

   Amaranthus albus White pigweed New in 2003
   Amaranthus hybridus Green amaranth
   Amaranthus retroflexus Common amaranth
   Ambrosia artemisifolia Common ragweed New in 2003
   Ambrosia trifolia Greater ragweed New in 2003
   Ammi majus Bullwort Persisted for five years
   Ammi visnaga Toothpick plant
   Anchusa arvensis Bugloss A UK native, but recorded only as a bird seed introduction in 2003
   Asperula arvensis Blue wood-ruff
   Brachiaria platyphylla Broad-leaved signal-grass
   Brassica juncea Chinese mustard
   Cannabis sativa Hemp
   Carthamus tinctorius Safflower New in Heron's Gren Bay in 2005
   Chenopodium probstii Probst's goosefoot New in 2003 (Heron's Green Bay) - the third Avon record
   Digitaria sanguinalis Hairy finger-grass
   Echinochloa crus-gallii Cockspur
   Fagopyron esculentum Buckwheat
   Guizotia abyssinica Niger
   Helianthus annuus Sunflower
   Linum usitasissimum Flax
   Lycopersicon esculentum Tomato Several plants found growing in Spring Bay in 2005
   Panicum milliaceum Common millet
   Phalaris canariensis Canary grass
   Setaria viridis Green bristle-grass
   Solanum rostratum Buffalo-bur
   Triticum aestivum Wheat
   Zea mays Maize

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