Achillea millefolium  Yarrow
 Achillea ptarmica  Sneezewort
 Aconitum x stoerkianum  Hybrid Monk'shood
 Acorus calamus  Sweet Flag
 Adoxa moschatellina  Moschatel
 Aegopodium podagraria  Ground-elder
 Aethusa cynapium  Fool's Parsley
 Agrimonia eupatoria  Agrimony
 Agrostemma githago  Corncockle
 Ajuga reptans  Bugle
 Alcea rosea  Hollyhock
 Alchemilla glabra  Lady's Mantle
 Alchemilla mollis  Garden Lady's-mantle
 Alchemilla xanthochlora  Lady's Mantle
 Alisma plantago-aquatica  Water-plantain
 Alliaria petiolata  Garlic Mustard
 Allium schoenoprasum  Chives
 Allium ursinum  Ramsons
 Allium vineale  Wild Onion
 Ambrosia artemisifolia  Ragweed
 Anacamptis morio  Green-winged Orchid
 Anagallis arvensis  Scarlet Pimpernel
 Anchusa arvensis  Bugloss
 Anemone nemorosa  Wood Anemone
 Angelica archangelica  Garden Angelica
 Angelica sylvestris  Wild Angelica
 Anthemis austriaca  Austrian Chamomile
 Anthemis arvensis  Corn Chamomile
 Anthriscus sylvestris  Cow Parsley
 Anthyllis vulneraria  Kidney Vetch
 Antirrhinum majus  Snapdragon
 Aphanes arvensis  Parsley-piert
 Apium inundatum  Lesser Marshwort
 Apium nodiflorum  Fool's Water-cress
 Aquilegia vulgaris  Columbine
 Arabidopsis thaliana  Thale Cress
 Arctium lappa  Greater Burdock
 Arctium minus  Lesser Burdock
 Arenaria serpyllifolia  Thyme-leaved Sandwort
 Armoraria rusticana  Horse Radish
 Artemisia absinthium  Wormwood
 Artemisia vulgaris  Mugwort
 Arum maculatum  Lords-and-Ladies
 Aruncus dioicus  Buck's-beard
 Aster aggregate  Michaelmas Daisy
 Aster novi-belgii  Confused Michaelmas Daisy
 Aster x salignus  Common Michaelmas-daisy
 Atriplex patula  Common Orache
 Atriplex prostrata  Spear-leaved Orache
 
 Ballota nigra  Black Horehound
 Barbarea intermedia  Medium-flowered Winter-cress
 Barbarea vulgaris  Wintercress
 Bellis perennis  Daisy
 Beta vulgaris  Beet
 Betonica officinalis  Betony
 Bidens bipinnata  Spanish-needles
 Bidens cernua  Nodding Bur-marigold
 Bidens frondosa  Beggarsticks
 Bidens tripartita  Trifid Bur-marigold
 Blackstonia perfoliata  Yellow-wort
 Brassica napus  Oil-seed Rape
 Brassica nigra  Black Mustard
 Brassica rapa  Bargeman's Cabbage
 Brassica tournefortii  Pale Cabbage
 Brunnera macrophylla  Great For-get-me-not
 Butomus umbellatus  Flowering-rush
 
 Calendula officinalis  Pot Marigold
 Callitriche aggregate  Water-starworts
 Callitriche hermaphroditica  Autumnal Water-starwort
 Callitriche platycarpa  Various-leaved Water-starwort
 Callitriche stagnalis  Common Water-Starwort
 Caltha palustris  Marsh-marigold
 Calystegia pulchra  Hairy Bindweed
 Calystegia sepium  Hedge Bindweed
 Calystegia silvatica  Large Bindweed
 Camelina sativa  Gold-of-Pleasure
 Campanula glomerata  Clustered Bellflower
 Campanula latifolia  Gaint Bellflower
 Campanula persicifolia  Peach-leaved Bell-flower
 Campanula portenschlagiana  Adria Bellflower
 Campanula poscharskyana  Trailing Bell-flower
 Campanula rotundifolia  Harebell
 Capsella bursa-pastoris  Shepherd's-purse
 Cardamine amara  Large Bitter-cress
 Cardamine flexuosa  Wavy Bitter-cress
 Cardamine hirsuta  Hairy Bitter-cress
 Cardamine pratensis  Cuckooflower
 Carduus nutans  Musk Thistle
 Carthamus tinctorius  Safflower
 Carum carvi  Caraway
 Centaurea cyanus  Cornflower
 Centaurea montana  Perennial Cornflower
 Centaurea nigra  Common Knapweed
 Centaurea scabiosa  Greater Knapweed
 Centaurium erythraea  Common Centaury
 Centranthus ruber  Red Valerian
 Cerastium arvense  Field Mouse-ear
 Cerastium fontanum  Common Mouse-ear Chickweed
 Cerastium glomeratum  Sticky Mouse-ear Chickweed
 Cerastium semidecandrum  Little Mouse-ear
 Cerastium tomentosum  Snow in Summer
 Ceratocapnos claviculata  Climbing Corydalis
 Ceratophyllum demersum  Rigid Hornwort
 Chaerophyllum temulum  Rough Chervil
 Chamaemelum nobile  Chamomile
 Chamerion angustifolium  Rosebay Willowherb
 Chelidonium majus  Greater Celandine
 Chenopodium album  Fat Hen
 Chenopodium bonus-henricus  Good-King-Henry
 Chenopodium polyspermum  Many-seeded Goosefoot
 Chenopodium rubrum  Red Goosefoot
 Chrysosplenium oppositifolium  Opposite-leaved Golden-saxifrage
 Cicerbita macrophylla  Common Blue-sow-thistle
 Cichorium intybus  Chicory
 Cicuta virosa  Cowbane
 Circaea lutetiana  Enchanter's-nightshade
 Cirsium arvense  Creeping Thistle
 Cirsium palustre  Marsh Thistle
 Cirsium vulgare  Spear Thistle
 Claytonia perfoliata  Spring Beauty
 Claytonia sibirica  Pink Purslane
 Cochlearia danica  Danish Scurvygrass
 Comarum palustris  Marsh Cinquefoil
 Conium maculatum  Hemlock
 Conopodium majus  Pignut
 Convallaria majalis  Lily-of-the-valley
 Convolvulus arvensis  Field Bindweed
 Conyza canadensis  Canadian Fleabane
 Conyza sumatrensis  Guernsey Fleabane
 Crassula helmsii  New Zealand Pigmyweed
 Crepis biennis  Rough Hawk's-beard
 Crepis capillaris  Smooth Hawk's-beard
 Crepis paludosa  Marsh Hawk's-beard
 Crepis setosa  Bristly Hawk's-beard
 Crepis tectorum  Narrow-leaved Hawk's-beard
 Crepis vesicaria  Beaked Hawk's-beard
 Crocosmia paniculata  Aunt Eliza
 Crocosmia x crocosmiiflora  Montbretia
 Crocus nudiflorus  Autumn Crocus
 Crocus tommasinianus  Early Crocus
 Crocus vernus  Spring Crocus
 Crocus x stellaris  Yellow Crocus
 Cruciata laevipes  Crosswort
 Cuscuta epilinum  Flax Dodder
 Cymbalaria muralis  Ivy-leaved Toadflax
 Cymbalaria pallida  Italian Toadflax
 
 Dactylorhiza fuchsii  Common Spotted-orchid
 Dactylorhiza incarnata  Early Marsh-orchid
 Dactylorhiza indet.  A Marsh-orchid
 Dactylorhiza maculatum  Heath Spotted-orchid
 Dactylorhiza praetermissa  Southern Marsh-orchid
 Dactylorhiza purpurella  Northern Marsh-orchid
 Dactylorhiza x grandis  A Marsh-orchid
 Dactylorhiza x kernerorum  A Marsh-orchid
 Datura stramonium  Thorn-apple
 Daucus carota  Wild Carrot
 Daucus carota subsp. sativus  Cultivated Carrot
 Dicentra spectabilis  Bleeding heart
 Digitalis purpurea  Foxglove
 Diplotaxis muralis  Annual Wall-rocket
 Dipsacus fullonum  Wild Teasal
 Dipsacus sativus  Fuller's Teasel
 Drosera anglica  Great Sundew
 Drosera intermedia  Oblong-leaved Sundew
 Drosera rotundifolia  Round-leaved Sundew
 
 Echinops bannaticus  Blue Globe-thistle
 Echium vulgare  Viper's Bugloss
 Elodea canadensis  Canadian Waterweed
 Elodea nuttallii  Nuttall's Water-weed
 Enarthrocarpos lyratus  
 Epilobium ciliatum  American Willowherb
 Epilobium montanum  Broad-leaved Willowherb
 Epilobium hirsutum  Great Willowherb
 Epilobium obscurum  Short-fruited Willowherb
 Epilobium palustre  Marsh Willowherb
 Epilobium parviflorum  Hoary Willowherb
 Epilobium roseum  Pale Willowherb
 Epilobium tetragonum  Square-stalked Willowherb
 Epipactis helleborine  Broad-leaved Helleborine
 Epipactis palustris  Marsh Helleborine
 Erigeron acer  Blue Fleabane
 Erodium cicutarium  Common Stork's-bill
 Erodium moschatum  Musk Stork's-bill
 Erophila verna  Common Whitlow-grass
 Erysimum cheiranthoides  Treacle Mustard
 Erysimum cheiri  Wallflower
 Eupatorium cannabinum  Hemp-agrimony
 Euphrasia officinalis  Eyebright
 Euphorbia amygdaloides ssp. robbiae  Turkish Wood-spurge
 Euphorbia cyparissias  Cypress Spurge
 Euphorbia esula?  Leafy spurge
 Euphorbia exigua  Dwarf Spurge
 Euphorbia helioscopia  Sun Spurge
 Euphorbia peplus  Petty Spurge
 
 Fagopyrum esculentum  Buckwheat
 Fallopia convolvulus  Black-bindweed
 Fallopia japonica  Japanese Knotweed
 Fallopia sachalinensis  Giant Knotweed
 Ficaria verna  Lesser Celandine
 Ficaria verna subsp. fertilis  Lesser Celandine
 Ficaria verna subsp. verna  Bulbiferous Celandine
 Filago minima  Small Cudweed
 Filipendula ulmaria  Meadowsweet
 Foeniculum vulgare  Fennel
 Fragaria ananassa  Garden Strawberry
 Fumaria muralis subsp. boraei  Common Ramping-fumitory
 Fumaria officinalis  Common fumitory
 
 Gagea bohemica  Early Star-of-Bethlehem
 Galanthus nivalis  Snowdrop
 Galeopsis bifida  Bifid Hemp-nettle
 Galeopsis speciosa  Large-flowered Hemp-nettle
 Galeopsis tetrahit sensu lato  Common Hemp-nettle
 Galeopsis tetrahit sensu stricto  Common Hemp-nettle
 Galinsoga quadriradiata  Shaggy-soldier
 Galium album  Hedge Bedstraw
 Galium aparine  Cleavers
 Galium odoratum  Woodruff
 Galium palustre  Common Marsh-bedstraw
 Galium saxatile  Heath Bedstraw
 Galium uliginosum  Fen Bedstraw
 Galium vernum  Lady's Bedstraw
 Geranium dissectum  Cut-leaved Crane's-bill
 Geranium lucidum  Shining Cranes-bill
 Geranium molle  Dove's-foot Cranes-bill
 Geranium phaeum  Dusky Crane's-bill
 Geranium pratense  Meadow Crane's-bill
 Geranium pusillum  Small-flowered Crane's-bill
 Geranium pyrenaicum  Hedgerow Crane's-bill
 Geranium robertianum  Herb-robert
 Geranium sanguineum  Bloody Crane's-bill
 Geranium versicolor  Pencilled Crane's-bill
 Geranium x magnificum  Purple Crane's-bill
 Geranium x oxanianum  Druce’s Crane's-bill
 Geum rivale  Water Avens
 Geum urbanum  Wood-avens
 Geum x intermedium  Hybrid Avens
 Glebionis segetum  Corn Marigold
 Glechoma hederacea  Ground-ivy
 Gnaphalium sylvaticum  Heath Cudweed
 Gnaphalium uliginosum  Marsh Cudweed
 Gymnadenia conopsea  Fragrant Orchid
 
 Helianthus annuus  Sunflower
 Helianthus bolanderi  Bolander’s Sunflower
 Heracleum mantegazzianum  Giant Hogweed
 Heracleum sphondylium  Hogweed
 Heracleum sphondylium angustifolium  Narrow-leaved Hogweed
 Hesperis matronalis  Dames Violet
 Hieracium acuminatum non Jordan  Hawkweed
 Hieracium aggregate  Hawkweed
 Hieracium exotericum sensu lato  Hawkweed
 Hieracium maculatum  Hawkweed
 Hieracium sabaudum  Hawkweed
 Hieracium umbellatum  Hawkweed
 Hieracium vagum  Hawkweed
 Hieracium vulgatum  Hawkweed
 Hirschfeldia incana  Hoary Mustard
 Hottonia palustris  Water-violet
 Hyacinthoides hispanica  Spanish Bluebell
 Hyacinthoides non-scripta  Bluebell
 Hyacinthoides x massartiana  Garden Bluebell
 Hydrocharis morsus-ranae  Frog-bit
 Hydrocotyle vulgaris  Marsh Pennywort
 Hypericum hirsutum  Hairy St John's-wort
 Hypericum humifusum  Trailing St John's-wort
 Hypericum maculatum  Imperforate St John's-wort
 Hypericum perforatum  Perforate St John's-wort
 Hypericum tetrapterum  Square-stalked St John's-wort
 Hypochaeris radicata  Cat's-ear
 
 Impatiens capensis  Orange Balsam
 Impatiens glandulifera  Indian Balsam
 Iris foetidissima  Stinking Iris
 Iris germanica  Bearded Iris
 Iris pseudacorus  Yellow Flag
 
 Kickxia elatine  Sharp-leaved Fluellen
 Knautia arvensis  Field Scabious
 
 Lactuca serriola  Prickly Lettuce
 Lagarosiphon major  Curly Waterweed
 Lamiastrum galeobdolon argentatum  Variegated Yellow Archangel
 Lamiastrum galeobodolon montanum  Yellow Archangel
 Lamium album  White Dead-nettle
 Lamium amplexicaule  Henbit Dead-nettle
 Lamium hybridum  Cut-leaved Dead-nettle
 Lamium maculatum  Spotted Dead-nettle
 Lamium purpureum  Red Dead-nettle
 Lapsana communis  Nipplewort
 Lathraea squamaria  Toothwort
 Lathyrus grandiflorus  Two-flowered Everlasting-pea
 Lathyrus latifolius  Broad-leaved Everlasting-pea
 Lathyrus linifolius  Bitter-vetch
 Lathyrus nissolia  Grass Vetchling
 Lathyrus odoratus  Sweet Pea
 Lathyrus pratensis  Meadow Vetchling
 Lathyrus tuberosus  Tuberous Pea
 Lemna gibba  Fat Duckweed
 Lemna minor  Common Duckweed
 Lemna minuta  Least Duckweed
 Lemna trisulca  Ivy-leaved Duckweed
 Leontondon hispidus  Rough Hawkbit
 Leontodon saxatilis  Lesser hawkbit
 Lepidium campestre  Field Pepperwort
 Lepidium didymum  Lesser Swine-cress
 Lepidium heterophyllum  Smith's Pepperwort
 Lepidium ruderale  Narrow-leaved Pepperwort
 Leucanthemum vulgare  Oxeye Daisy
 Leucanthemum x superbum  Shasta Daisy
 Limnanthes douglasii  Meadow-foam
 Linaria purpurea  Purple Toadflax
 Linaria repens  Pale Toadflax
 Linaria vulgaris  Common Toadflax
 Linum catharticum  Fairy Flax
 Linum usitatissimum  Flax
 Lithospermum officinale  Common Gromwell
 Lobularia maritima  Sweet Alison
 Lotus corniculatus  Common Bird's-foot-trefoil
 Lotus corniculatus var. sativus  
 Lotus pendunculatus  Greater Bird's-foot-trefoil
 Lunaria annua  Honesty
 Lupinus angustifolius  Narrow-leaved Lupin
 Lupinus arboreus  Tree Lupin
 Lupinus x regalis  Russell Lupin
 Luronium natans  Floating Water-plantain
 Lycopus europaeus  Gypsywort
 Lysichiton americanus  American Skunk-cabbage
 Lysimachia nemorum  Yellow Pimpernel
 Lysimachia nummularia  Creeping Jenny
 Lysimachia punctata  Dotted Loosestrife
 Lysimachia vulgaris  Yellow Loosestrife
 Lythrum hyssopifolia  Grass-poly
 Lythrum portula  Water-purslane
 Lythrum salicaria  Purple-loosestrife
 
 Malcolmia maritima  Virginia Stock
 Malva moschata  Musk Mallow
 Malva neglecta  Dwarf mallow
 Malva sylvestris  Common Mallow
 Malva x clementii  Hybrid Tree-mallow 
 Marrubium vulgare  White Horehound
 Matricaria disciformis  
 Matricaria discoidea  Pineapple-weed
 Matricaria recutita  Scented Mayweed
 Mauranthemum paludosum  Dwarf Daisy
 Meconopsis cambrica  Welsh Poppy
 Medicago arabica  Spotted Medick
 Medicago lupulina  Black Medick
 Medicago polymorpha  Toothed Medick
 Medicago sativa subsp. sativa  Lucerne
 Melilotus albus  White Melilot
 Melilotus altissimus  Tall Melilot
 Melilotus indicus  Small Melilot
 Melilotus officinalis  Ribbed Melilot
 Melissa officinalis  Lemon-scented Balm
 Mentha aquatica  Water Mint
 Mentha arvensis  Corn Mint
 Mentha spicata  Spear Mint
 Mentha x gracilis  Bushy Mint
 Mentha x piperita  Peppermint
 Mentha x rotundifolia  False Apple-mint
 Mentha x smithiana  Tall Mint
 Mentha x villosa  Apple-mint
 Menyanthes trifoliata  Bogbean
 Mercurialis perennis  Dog's Mercury
 Mimulus aggregate  Monkey-flower
 Mimulus guttatus  Monkeyflower
 Mimulus moschatus  Musk
 Mimulus x robertsii  Hybrid Monkey-flower
 Moehringia trinerva  Three-nerved Sandwort
 Moenchia erecta  Upright Chickweed
 Montia fontana  Blinks
 Mycelis muralis  Wall Lettuce
 Myosotis arvensis  Field Forget-me-not
 Myosotis discolor  Changing Forget-me-not
 Myosotis laxa  Tufted Forget-me-not
 Myosotis scorpioides  Water Forget-me-not
 Myosotis sylvatica  Wood Forget-me-not
 Myosoton aquaticum  Water Chickweed
 Myriophyllum spicatum  Whorled Water-milfoil
 Myriophyllum verticillatum  Spiked Water-milfoil
 Myrrhis odorata  Sweet Cicely
 
 Narcissus aggregate  Daffodils
 Narcissus pseudo-narcissus  Wild Daffodil
 Narthecium ossifragum  Bog Asphodel
 Nasturtium officinale  Water-cress
 Neottia ovata  Common Twayblade
 Nicandra physalodes  Apple-of-Peru
 Nuphar lutea  Yellow Water-lily
 Nymphaea  Cultivated Water-lily
 Nymphaea alba  White Water-lily
 Nymphoides peltata  Fringed water-lily
 
 Odontites vernus  Red Bartsia
 Oenanthe crocata  Hemlock Water-dropwort
 Oenanthe fistulosa  Tubular Water-dropwort
 Oenothera aggregate  Evening-primrose
 Oenothera biennis  Common Evening-primrose
 Oenothera glazioviana  Large-flowered Evening-primrose
 Oenothera versicolor  Sunset Evening-primrose
 Ophrys apifera  Bee Orchid
 Ornithopus perpusillus  Bird's-foot
 Onobrychis viciifolia  Sainfoin
 Orchis mascula  Early-purple Orchid
 Origanum vulgare  Wild Marjoram
 Orobanche rapum-genistae  Greater Broomrape
 Oxalis acetosella  Wood-sorrel
 Oxalis articulata  Pink Oxalis
 Oxalis corniculata  Procumbent Yellow-sorrel
 Oxalis exilis  Least Yellow-sorrel
 Oxalis incarnata  Pale Pink-oxalis
 
 Papaver dubium  Long-headed Poppy
 Papaver rhoeas  Common poppy
 Papaver somniferum  Opium Poppy
 Parentucellia viscosa  Yellow Bartsia
 Parietaria judaica  Pellitory-of-the-wall
 Pastinaca sativa  Wild Parsnip
 Pentaglottis sempervirens  Green Alkanet
 Persicaria amphibia  Amphibious Bistort
 Persicaria bistorta  Common Bistort
 Persicaria hydropiper  Water-pepper
 Persicaria lapathifolia  Pale Persicaria
 Persicaria maculosa  Redshank
 Petasites albus  White Butterbur
 Petasites hybridus  Butterbur
 Picris hieracioides  Hawkweed Oxtongue
 Pilosella aurantiaca  Fox-and-cubs
 Pilosella officinarum  Mouse-ear-hawkweed
 Pimpinella major  Greater Burnet-saxifrage
 Pisum sativum  Garden Pea
 Plantago coronopus  Buck's-horn Plantain
 Plantago lanceolata  Ribwort Plantain
 Plantago major  Greater Plantain
 Plantago media  Hoary Plantain
 Platanthera bifolia  Lesser Butterfly-orchid
 Polemonium caeruleum  Jacob's-ladder
 Polygonatum x hybridum  Garden Solomon's-seal
 Polygonum arenastrum  Equal-leaved Knotgrass
 Polygonum aviculare  Knotgrass
 Potamogeton alpinus  Red Pondweed
 Potamogeton berchtoldii  Small Pondweed
 Potamogeton compressus  Grass-wrack Pondweed
 Potamogeton crispus  Curled Pondweed
 Potamogeton lucens  Shining Pondweed
 Potamogeton natans  Broad-leaved Pondweed
 Potamogeton obtusifolius  Blunt-leaved Pondweed
 Potamogeton pectinatus  Fennel Pondweed
 Potamogeton perfoliatus  Perfoliate Pondweed
 Potamogeton pusillus  Lesser Pond-weed
 Potamogeton trichoides  Hairlike Pondweed
 Potentilla anglica  Trailing Tormentil
 Potentilla anserina  Silverweed
 Potentilla erecta  Tormentil
 Potentilla intermedia  Russian Cinquefoil
 Potentilla recta  Sulphur Cinquefoil
 Potentilla reptans  Creeping Cinquefoil
 Potentilla x mixta  Hybrid Tormentil
 Poterium sanguisorba balearicum  Fodder Burnet
 Primula vulgaris  Primrose
 Primula veris  Cowslip
 Primula x polyantha cultivar  Polyanthus
 Prunella vulgaris  Selfheal
 Pseudofumaria lutea  Yellow Corydalis
 Pulicaria dysenterica  Common Fleabane
 Pulmonaria officinalis  Lungwort
 Pyrola minor  Common Wintergreen
 
 Radiola linoides  Allseed
 Ranunculus acris  Meadow Butterbup
 Ranunculus aquatilis  Water-crowfoot
 Ranunculus arvensis  Corn Buttercup
 Ranunculus auricomus  Goldilocks Buttercup
 Ranunculus bulbosus  Bulbous Buttercup
 Ranunculus flammula  Lesser Spearwort
 Ranunculus hederaceus  Ivy-leaved Crowfoot
 Ranunculus lingua  Greater Spearwort
 Ranunculus omiophyllus  Round-leaved Crowfoot
 Ranunculus parviflorus  Small-flowered Buttercup
 Ranunculus peltatus  Pond Water-crowfoot
 Ranunculus repens  Creeping Buttercup
 Ranunculus sardous  Hairy Buttercup
 Ranunculus sceleratus  Celery-leaved Buttercup
 Ranunculus x bachii  Wirtgen’s Water-crowfoot
 Raphanus raphanistrum  Wild Radish
 Reseda lutea  Wild Mignonette
 Reseda luteola  Weld
 Rhinanthus minor  Yellow-rattle
 Rorippa amphibia  Great Yellow-cress
 Rorippa palustris  Marsh Yellow-cress
 Rorippa sylvestris  Creepng Yellow-cress
 Rumex acetosa  Common Sorrel
 Rumex acetosella  Sheep's Sorrel
 Rumex conglomeratus  Clustered Dock
 Rumex crispus  Curled Dock
 Rumex hydrolapathum  Water Dock/Great Water Dock
 Rumex obtusifolius  Broad-leaved Dock
 Rumex sanguineus  Wood Dock
 Rumex x pratensis  Curled Dock x Broad-leaved Dock
 Ruppia maritima  Beaked Tasselweed
 
 Sagina apetala  Annual Pearl-wort
 Sagina nodosa  Knotted Pearl-wort
 Sagina procumbens  Comon Pearl-wort
 Sagittaria sagittifolia  Arrowhead
 Salsola kali  Saltwort
 Sanguisorba officinalis  Great Burnet
 Sanicula europaea  Sanicle
 Saponaria officinalis  Soapwort
 Saxifraga granulata  Meadow saxifrage
 Saxifraga tridactylites  Rue-leaved Saxifrage
 Saxifraga x polita  False Londonpride
 Saxifraga x urbium  Londonpride
 Scandix pecten-veneris  Shepherd's-needle
 Scleranthus annuus  Annual Knawel
 Scorzoneroides autumnalis  Autumn Hawkbit
 Scrophularia auriculata  Water Figwort
 Scrophularia nodosa  Common Figwort
 Scutellaria galericulata  Skullcap
 Sedum acre  Biting-stonecrop
 Sedum album  White Stonecrop
 Sedum rupestre  Reflexed-stonecrop
 Sedum spectabile  Butterfly Stonecrop
 Sedum spurium  Caucasian-stonecrop
 Sedum telephium  Orpine
 Sempervivum tectorum  Houseleek
 Senecio cineraria  Silver Ragwort
 Senecio erucifolius  Hoary Ragwort
 Senecio jacobaea  Common Ragwort
 Senecio sarracenicus  Broad-leaved Ragwort
 Senecio squalidus  Oxford Ragwort
 Senecio sylvaticus  Heath Groundsel
 Senecio viscosus  Sticky Groundsel
 Senecio vulgaris  Groundsel
 Senecio vulgaris var. hibernicus  Rayed Groundsel
 Senecio vulgaris var. vulgaris  Groundsel
 Senecio x albescens  A Ragwort
 Senecio x ostenfeldii  A Ragwort
 Serratula tinctoria  Saw-wort
 Sherardia arvensis  Field Madder
 Sidalcea malviflora  Hollyhock
 Silene dioica  Red Campion
 Silene latifolia  White Campion
 Silene flos-cuculi  Ragged Robin
 Silene vulgaris  Bladder Campion
 Silene x hampeana  Pink Campion
 Silybum marianum  Milk Thistle
 Sinapsis alba  White Mustard
 Sinapsis arvensis  Charlock
 Sison amomum  Stone Parsley
 Sisymbrium altissimum  Perennial Rocket
 Sisymbrium officinale  Hedge Mustard
 Sisymbrium orientale  Eastern rocket
 Sium latifolium  Greater Water-parsnip
 Solanum dulcamara  Bittersweet
 Solanum lycoperiscum  Tomato
 Solanum nigrum  Black Nightshade
 Solanum tuberosum  Potato
 Solidago aggregate  Garden Goldenrods
 Solidago canadensis  Canadian Goldenrod
 Solidago gigantea  Early Golden Rod
 Solidago rugosa  Rough-stemmed Goldenrod
 Solidago virgaurea  Goldenrod
 Sonchus arvensis  Perennial Sow-thistle
 Sonchus asper  Prickly Sow-thistle
 Sonchus oleraceus  Smooth Sow-thistle
 Sparganium emersum  Unbranched Bur-reed
 Sparganium erectum  Branched Bur-reed
 Spergula arvensis  Corn-spurrey
 Spergularia marina  Lesser sea-spurrey
 Spergularia rubra  Sand-spurrey
 Stachys arvensis  Field Woundwort
 Stachys palustris  Marsh Woundwort
 Stachys sylvatica  Hedge Woundwort
 Stachys x ambigua  Hybrid Woundwort
 Stellaria graminea  Lesser Stitchwort
 Stellaria holostea  Greater stitchwort
 Stellaria media  Common Chickweed
 Stellaria neglecta  Greater Chickweed
 Stellaria nemorum  Wood Stitchwort
 Stellaria uliginosa  Bog Stitchwort
 Stratiotes aloides  Water-soldier
 Succisa pratensis  Devil's-bit Scabious
 Symphytum officinale  Common Comfrey
 Symphytum x uplandicum  Russian Comfrey
 
 Tanacetum parthenium  Feverfew
 Tanacetum vulgare  Tansy
 Taraxacum aggregate  Dandelions
 Teesdalia nudicaulis  Shepherd's Cress
 Tellima grandiflora  Fringe-cups
 Teucrium scorodonia  Wood Sage
 Thalictrum flavum  Common Meadow-rue
 Thalictrum minus  Lesser Meadow-rue
 Thelesperma trifida  Najavo Tea
 Thlaspi arvense  Common Penny-cress
 Tolmiea menziesii  Pick-a-back-plant
 Torilis japonica  Upright Hedge-parsley
 Torilis nodosa  Knotted Hedge-parsley
 Trachystemon orientalis  Abraham-Isaac-Jacob
 Tragapogon pratensis  Goat's-beard
 Trifolium arvense  Hare's-foot Clover
 Trifolium aureum  Large Trefoil
 Trifolium campestre  Hop Trefoil
 Trifolium dubium  Lesser Trefoil
 Trifolium hybridum  Aliske Clover
 Trifolium medium  Zigzag Clover
 Trifolium micranthum  Slender Trefoil
 Trifolium ornithopodioides  Bird's-foot Clover
 Trifolium pratense  Red Clover
 Trifolium repens  White Clover
 Triglochin palustre  Marsh Arrowgrass
 Trigonella foenum-graecum  Fenugreek
 Tripleurospermum inodorum  Scentless Mayweed
 Tropaeolum majus  Nasturtium
 Tussilago farfara  Colt's-foot
 Typha angustifolia  Lesser Bulrush
 Typha latifolia  Bulrush
 Typha x glauca  Hybrid Bulrush
 
 Urtica dioica  Stinging Nettle
 Urtica urens  Small Nettle
 Utricularia australis  Bladderwort
 Utricularia minor  Lesser Bladderwort
 Utricularia vulgaris  Greater Bladderwort
 
 Vaccaria hispanica  Cowherb
 Valeriana dioica  Marsh Valerian
 Valeriana officinalis  Common Valerian
 Verbascum thapsus  Great Mullein
 Veronica agrestis  Green Field-speedwell
 Veronica anagallis-aquatica  Blue Water-speedwell
 Veronica arvensis  Wall Speedwell
 Veronica beccabunga  Brooklime
 Veronica chamaedrys  Germander Speedwell
 Veronica filiformis  Slender Speedwell
 Veronica hederifolia  Ivy-leaved Speedwell
 Veronica hederifolia subsp. hederifolia  Ivy-leaved Speedwell
 Veronica hederifolia subsp. lucorum  Ivy-leaved Speedwell
 Veronica montana  Wood Speedwell
 Veronica officinalis  Heath Speedwell
 Veronica persica  Common Field-speedwell
 Veronica scutellata  Marsh Speedwell
 Veronica serpyllifolia  Thyme-leaved Speedwell
 Vicia cracca  Tufted Vetch
 Vicia hirsuta  Hairy Tare
 Vicia lutea  Yellow-vetch
 Vicia sativa subsp. nigra  Narrow-leaved Vetch
 Vicia sativa subsp. segetalis  Common Vetch
 Vicia sepium  Bush Vetch
 Vicia sylvatica  Wood Vetch
 Vicia tetrasperma  Smooth Tare
 Vinca major  Greater Periwinkle
 Vinca minor  Lesser Periwinkle
 Viola arvensis  Field Pansy
 Viola odorata  Sweet Violet
 Viola palustris  Marsh Violet
 Viola riviniana  Common Dog-violet
 Viola tricolor  Wild Pansy
 Viola x contempta  V. tricolor x arvensis
 Viola x wittrockiana  Garden pansy
 
 Zannichellia palustris  Horned Pondweed