| Agrimonia procera | Fragrant Agrimony | 2000 Oxfordshire |
| Agrimonia procera | Fragrant Agrimony | 2000 Bedgebury |
| Aira caryophyllea | Silver Hair Grass | 2000 Frensham Surrey |
| Aira praecox | Early Hair Grass | 2000 Frensham Surrey |
| Allium neapolitanum | Neapolitan Garlic | 2000 Guernsey |
| Allium scorodoprasum | Sand Leek | 2000 Norfolk |
| Allium subhirsutum | Hairy Garlic | 2000 Guernsey |
| Amelanchier lamarckii | Juneberry | 2000 Frensham Surrey |
| Anacamptis pyramidalis | Pyramidal Orchid | 2000 Durham |
| Anogramma leptophylla | Jersey Fern | 2000 Guernsey |
| Antennaria dioica | Mountain Everlasting | 2000 North East Wales |
| Anthemis cotula | Stinking Chamomile | 2000 West Sussex |
| Anthriscus sylvestris | Cow Parsley | 2000 Guernsey |
| Anthyllis vulneraria ssp. corbierei | Corbier's Kidney Vetch | 2000 Guernsey |
| Apium graveolens | Wild Celery | 2000 Norfolk |
| Arctostaphylos uva-ursi | Bearberry | 2000 Morayshire |
| Artemisia verlotiorum | Chinese Mugwort | 2000 Durham |
| Artemisia verlotiorum | Chinese Mugwort | 2000 Guernsey |
| Asperula cynanchica | Squinancywort | 2000 West Sussex |
| Asplenium adiantum-nigrum | Black Spleenwort | 2000 Guernsey |
| Asplenium adiantum-nigrum x Asplenium obovatum | Hybrid Spleenwort | 2000 Guernsey |
| Asplenium obovatum | Lanceolate Spleenwort | 2000 Guernsey |
| Asplenium x sarniensis | Guernsey Spleenwort | 2000 Guernsey |
| Aster tripolium | Sea Aster | 2000 West Sussex |
| Astragalus glycyphyllos | Wild Liquorice | 2000 Oxfordshire |
| Astragalus glycyphyllos | Wild Liquorice | 2000 North East Wales |
| Atriplex littoralis | Grass-leaved Orache | 2000 West Sussex |
| Atriplex littoralis | Grass-leaved Orache | 2000 Norfolk |
| Atriplex portulacoides | Sea-purslane | 2000 West Sussex |
| Atriplex portulacoides | Sea Purslane | 2000 Norfolk |
| Atropa belladonna | Deadly Nightshade | 2000 West Sussex |
| Berberis wilsoniae | Mrs. Wilson's Barberry | 2000 North East Wales |
| Bidens cernua | Nodding Bur-marigold | 2000 West Sussex |
| Bidens tripartita | Trifid Bur-marigold | 2000 West Sussex |
| Bolboschoenus maritimus | Sea Club-rush | 2000 Leven East, Yorksh |
| Bolboschoenus maritimus | Sea Club-rush | 2000 Norfolk |
| Botrychium lunaria | Moonwort | 2000 Durham |
| Botrychium lunaria | Moonwort | 2000 Morayshire |
| Brachypodium sylvaticum | False Brome | 2000 North East Wales |
| Brassica oleracea | Cabbage | 2000 North East Wales |
| Briza media | Quaking-grass | 2000 West Sussex |
| Briza media | Quaking grass | 2000 North East Wales |
| Bromus pinnatum | Tor-grass | 2000 North East Wales |
| Bupleurum baldense | Small Hare's Ear | 2000 Guernsey |
| Cakile maritima | Sea Rocket | 2000 Norfolk |
| Calamagrostis canescens | Purple Small-reed | 2000 Leven East, Yorksh |
| Callitriche hamulata | Intermediate Water-starwort | 2000 West Sussex |
| Calystegia soldanella | Sea Bindweed | 2000 Norfolk |
| Campanula rapunculoides | Creeping Bellflower | 2000 Morayshire |
| Carduus nutans | Musk Thistle | 2000 North East Wales |
| Carduus tenuiflorus | Slender Thistle | 2000 North East Wales |
| Carex acuta | Slender Tufted-sedge | 2000 West Sussex |
| Carex appropinquata | Fibrous Tussock-sedge | 2000 Norfolk |
| Carex aquatilis | Water Sedge | 2000 Morayshire |
| Carex arenaria | Sand Sedge | 2000 Frensham Surrey |
| Carex disticha | Brown Sedge | 2000 Norfolk |
| Carex extensa | Long-bracted Sedge | 2000 Norfolk |
| Carex hostiana | Tawny Sedge | 2000 Norfolk |
| Carex lasiocarpa | Slender Sedge | 2000 Morayshire |
| Carex muricata ssp. muricata | Prickly Sedge | 2000 North East Wales |
| Carex pauciflora | Few-flowered Sedge | 2000 Morayshire |
| Carex pseudocyperus | Cyperus Sedge | 2000 West Sussex |
| Carlina vulgaris | Carline Thistle | 2000 Durham |
| Centaurea aspera | Rough Star Thistle | 2000 Guernsey |
| Centaurea nigra | Black Knapweed | 2000 Durham |
| Centaurium erythraea | Common Centaury | 2000 West Sussex |
| Cephalanthera damasonium | White Helleborine | 2000 Kent |
| Cephelanthera damasonium | White Helleborine | 2000 Andover Hants |
| Ceratophyllum demersum | Rigid Hornwort | 2000 Norfolk |
| Cicuta virosa | Cowbane | 2000 Norfolk |
| Circaea x intermedia = C. lutetiana x C. alpina | Upland Enchanter's-nightshade | 2000 Morayshire |
| Cirsium dissectum | Meadow Thistle | 2000 Norfolk |
| Cirsium eriophorum | Woolly Thistle | 2000 Oxfordshire |
| Cladium mariscus | Great Fen-sedge | 2000 Norfolk |
| Clinopodium acinos | Basil Thyme | 2000 South Downs |
| Clinopodium vulgare | Wild Basil | 2000 West Sussex |
| Coeloglossum viride | Frog Orchid | 2000 Oxfordshire |
| Coeloglossum viride | Frog Orchid | 2000 South Downs |
| Coeloglossum viride | Frog Orchid | 2000 North East Wales |
| Consolida ajacis | Larkspur | 2000 West Sussex |
| Conyza canadensis | Canadian Fleabane | 2000 West Sussex |
| Corynephorus canescens | Grey Hair-grass | 2000 Norfolk |
| Cotoneaster cambricus | Wild Cotoneaster | 2000 Great Orme |
| Cotoneaster microphyllus | Small-leaved Cotoneaster | 2000 North East Wales |
| Crambe maritima | Sea Kale | 2000 North East Wales |
| Crassula helmsii | New Zealand Pigmyweed | 2000 North East Wales |
| Crassula tillaea | Mossy Stonecrop | 2000 Guernsey |
| Crepis paludosa | Marsh Hawksbeard | 2000 North East Wales |
| Cynoglossum officinale | Hound's-tongue | 2000 North East Wales |
| Cynoglossum officinale | Hound's Tongue | 2000 Guernsey |
| Cytisis scoparius ssp. maritimus | Prostrate Broom | 2000 Guernsey |
| Dactylorhiza fuchsii | Common Spotted Orchid | 2000 Norfolk |
| Dactylorhiza fuchsii | Common Spotted Orchid | 2000 Oxfordshire |
| Dactylorhiza fuchsii | Common Spotted Orchid | 2000 North East Wales |
| Dactylorhiza fuschii | Common Spotted Orchid | 2000 Durham |
| Dactylorhiza fuschii | Common Spotted Orchid | 2000 Kent |
| Dactylorhiza maculata ssp ericetorum | Heath Spotted Orchid | 2000 Oxfordshire |
| Dactylorhiza praetermissa | Southern Marsh Orchid | 2000 North East Wales |
| Dactylorhiza praetermissa | Southern Marsh-orchid | 2000 Norfolk |
| Dactylorhiza purpurella | Northern Marsh Orchid | 2000 Durham |
| Dactylorhiza purpurella | Northern Marsh Orchid | 2000 North East Wales |
| Dactylorhiza traunsteineri | Narrow-lipped Marsh Orchid | 2000 Oxfordshire |
| Dryopteris affinis ssp borreri | Scaly Male-fern | 2000 Norfolk |
| Elodea canadensis | Canadian Waterweed | 2000 West Sussex |
| Elodea nuttallii | Nuttall's Waterweed | 2000 West Sussex |
| Eloecharis multicaulis | Many- stalked Spike-rush | 2000 Bedgebury |
| Elytrigia atherica | Sea Couch | 2000 West Sussex |
| Elytrigia atherica | Sea Couch | 2000 Norfolk |
| Elytrigia juncea | Sand Couch | 2000 West Sussex |
| Epipactis atrorubens | Dark Red Helleborine | 2000 Durham |
| Epipactis helleborine | Broad-leaved Helleborine | 2000 North East Wales |
| Epipactis palustris | Marsh Helleborine | 2000 Oxfordshire |
| Epipactis palustris | Marsh Helleborine | 2000 Norfolk |
| Equisetum hyemale | Rough Horsetail | 2000 North East Wales |
| Equisetum pratense | Shady Horsetail | 2000 Morayshire |
| Equisetum variegatum | Variegated Horsetail | 2000 Oxfordshire |
| Erica cinerea | Bell Heather | 2000 West Sussex |
| Erodium cicutarium | Common Stork's-bill | 2000 Frensham Surrey |
| Erodium maritimum | Sea Storksbill | 2000 Guernsey |
| Eryngium maritimum | Sea Holly | 2000 North East Wales |
| Euonymus europaeus | Spindle | 2000 West Sussex |
| Euphorbia exigua | Dwarf Spurge | 2000 West Sussex |
| Euphrasia confusa | Eyebright | 2000 West Sussex |
| Festuca altissima | Wood Fescue | 2000 Morayshire |
| Festuca arenaria | Rush-leaved Fescue | 2000 Norfolk |
| Frankenia laevis | Sea Heath | 2000 Norfolk |
| Galeopsis speciosa | Large-flowered Hemp-nettle | 2000 Leven East, Yorksh |
| Galium palustre ssp. elongatum | Upright Marsh Bedstraw | 2000 West Sussex |
| Galium palustre ssp. elongatum | Marsh-bedstraw | 2000 Norfolk |
| Galium uliginosum | Fen Bedstraw | 2000 Oxfordshire |
| Gaultheria mucronata | Prickly Heath | 2000 Frensham Surrey |
| Genista anglica | Petty Whin | 2000 Morayshire |
| Genista tinctoria | Dyer's Greenweed | 2000 Oxfordshire |
| Gentianella campestris | Field Gentian | 2000 Morayshire |
| Geranium sanguineum | Bloody Crane's-bill | 2000 Great Orme |
| Geranium sanguineum | Bloody Cranesbill | 2000 Durham |
| Geranium submolle | Alderney cranesbill | 2000 Guernsey |
| Glaucium flavum | Yellow Horned-poppy | 2000 North East Wales |
| Glaucium flavum | Yellow Horned Poppy | 2000 Norfolk |
| Gnaphalium undulatum | Cape Cudweed | 2000 Guernsey |
| Goodyera repens | Creeping Lady's-tresses | 2000 Morayshire |
| Gymnadenia conopsea | Fragrant Orchid | 2000 Durham |
| Gymnadenia conopsea ssp. conopsea | Fragrant Orchid | 2000 Morayshire |
| Gymnocarpium dryopteris | Oak Fern | 2000 Montgomeryshire |
| Helianthemum nummularium | Rock Rose | 2000 Durham |
| Helianthemum nummularium | Common Rock-rose | 2000 North East Wales |
| Helianthemum oelandicum | Hoary Rock-rose | 2000 Great Orme |
| Helianthemum oelandicum | Hoary Rock-rose | 2000 North East Wales |
| Herniaria ciliolata | Fringed Rupturewort | 2000 Guernsey |
| Hieracium cantianum | Hawkweed | 2000 Bedgebury |
| Hieracium chloranthum | Hawkweed | 2000 Morayshire |
| Himantoglossum hircinum | Lizard Orchid | 2000 Oxfordshire |
| Hippocrepis comosa | Horseshoe Vetch | 2000 West Sussex |
| Hirschfeldia incana | Hoary Mustard | 2000 West Sussex |
| Hirschfeldia incana | Hoary Mustard | 2000 North East Wales |
| Honckenya peploides | Sea Sandwort | 2000 West Sussex |
| Huperzia selago | Fir Clubmoss | 2000 Morayshire |
| Hydrocharis morsus-ranae | Frogbit | 2000 West Sussex |
| Hydrocharis morsus-ranae | Frogbit | 2000 Norfolk |
| Hypochaeris radicata | Ca'ts ear | 2000 North East Wales |
| Hypochoeris glabra | Smooth Cat's Ear | 2000 Frensham Surrey |
| Hypochoeris maculata | Spotted Cat's-ear | 2000 Great Orme |
| Inula conyzae | Ploughman's-spikenard | 2000 West Sussex |
| Isoetes histrix | Land Quillwort | 2000 Guernsey |
| Juncus capitatus | Dwarf Rush | 2000 Guernsey |
| Juncus subnodulosus | Blunt-flowered Rush | 2000 Oxfordshire |
| Juncus subnodulosus | Blunt-flowered Rush | 2000 Norfolk |
| Kickxia elatine | Sharp-leaved Fluellen | 2000 West Sussex |
| Lactuca virosa | Great Lettuce | 2000 North East Wales |
| Lathyrus japonicus | Sea pea | 2000 Norfolk |
| Lathyrus palustris | Marsh Pea | 2000 Norfolk |
| Leersia oryzoides | Cut-grass | 2000 West Sussex |
| Lemna gibba | Fat Duckweed | 2000 Norfolk |
| Leontodon hispidus | Rough Hawkbit | 2000 West Sussex |
| Leontodon saxatilis | Lesser Hawkbit | 2000 North East Wales |
| Lilium pyrenaicum | Pyrenean Lily | 2000 Morayshire |
| Limonium bellidifolium | Matted Sea-lavender | 2000 Norfolk |
| Limonium binervosum ssp. anglica | Rock Sea-lavender | 2000 Norfolk |
| Limonium humile | lax-flowered Sea-lavender | 2000 Norfolk |
| Limonium vulgare | Common Sea-lavender | 2000 West Sussex |
| Limosella aquatica | Mudwort | 2000 Oxfordshire |
| Linaria repens | Pale Toadflax | 2000 Morayshire |
| Linnaea borealis | Twinflower | 2000 Morayshire |
| Linum bienne | Pale Flax | 2000 North East Wales |
| Linum usitatissimum | Common Flax | 2000 North East Wales |
| Listera cordata | Lesser Twayblade | 2000 Morayshire |
| Listera ovata | Twayblade | 2000 Andover Hants |
| Listera ovata | Twayblade | 2000 Durham |
| Listera ovata | Twayblade | 2000 Kent |
| Lobelia dortmanna | Water Lobelia | 2000 Morayshire |
| Lonicera xylosteum | Fly Honeysuckle | 2000 South Downs |
| Lonicera xylosteum | Fly honeysuckle | 2000 West Sussex |
| Luzula luzuloides | White Woodrush | 2000 Frensham Surrey |
| Luzula multiflora ssp. congesta | Heath Woodrush | 2000 Morayshire |
| Lychnis flos-cuculi | Ragged Robin | 2000 Norfolk |
| Lychnis viscaria | Sticky Catchfly | 2000 Montgomeryshire |
| Lycopodiella inundata | Marsh Clubmoss | 2000 Morayshire |
| Lycopodium annotinum | Interrupted Clubmoss | 2000 Morayshire |
| Lycopodium clavatum | Stag's-horn Clubmoss | 2000 Morayshire |
| Matthiola sinuata | Sea Stock | 2000 Guernsey |
| Milium vernale ssp. sarniensis | Early Millet | 2000 Guernsey |
| Monotropa hypopitys | Yellow Bird's-nest | 2000 North East Wales |
| Muehlenbeckia complexa | New Zealand Wire Plant | 2000 Guernsey |
| Myriophyllum aquaticum | Parrot's-feather | 2000 North East Wales |
| Myriophyllum spicatum | Spiked Water-milfoil | 2000 Norfolk |
| Myriophyllum verticillatum | Whorled Water-milfoil | 2000 Leven East, Yorksh |
| Neottia nidus-avis | Bird's Nest Orchid | 2000 Kent |
| Nepeta x faassenii | Garden Cat-mint | 2000 North East Wales |
| Nuphar lutea | Yellow Water-lily | 2000 Leven East, Yorksh |
| Nuphar pumila | Least Water-lily | 2000 Morayshire |
| Nymphaea alba | White Water-lily | 2000 Leven East, Yorksh |
| Oenanthe aquatica | Fine-leaved Water-dropwort | 2000 West Sussex |
| Ononis spinosa | Spiny Restharrow | 2000 Oxfordshire |
| Ophioglossum lusitanicum | Least Adder's Tongue | 2000 Guernsey |
| Ophioglossum vulgatum | Adder's tongue | 2000 North East Wales |
| Ophioglossum vulgatum | Adder's-tongue | 2000 Norfolk |
| Ophrys apifera | Bee Orchid | 2000 Oxfordshire |
| Ophrys apifera | Bee Orchid | 2000 Durham |
| Ophrys apifera | Bee Orchid | 2000 North East Wales |
| Ophrys inectifera | Fly Orchid | 2000 Andover Hants |
| Ophrys inectifera | Fly Orchid | 2000 Kent |
| Orchis anthropophorum | Man Orchid | 2000 Kent |
| Orchis laxiflora | Loose-flowered Orchid | 2000 Guernsey |
| Orchis purpurea | Lady Orchid | 2000 Kent |
| Oreopteris limbosperma | Lemon-scented Fern | 2000 Bedgebury |
| Ornithopus perpusillus | Common Bird's-foot | 2000 Frensham Surrey |
| Ornithopus pinnatus | Orange Bird's Foot | 2000 Guernsey |
| Orobanche minor | Common Broomrape | 2000 Oxfordshire |
| Orobanche rapum-genistae | Greater Broomrape | 2000 Montgomeryshire |
| Orthilia secunda | Serrated Wintergreen | 2000 Morayshire |
| Parapholis incurva | Curved Hard-grass | 2000 Norfolk |
| Petrorhagia nanteuilii | Childing Pink | 2000 West Sussex |
| Petroselinum segetum | Corn Parsley | 2000 West Sussex |
| Peucedanum ostruthium | Masterwort | 2000 Morayshire |
| Peucedanum palustre | Milk-parsley | 2000 Leven East, Yorksh |
| Peucedanum palustre | Milk Parsley | 2000 Norfolk |
| Phleum arenarium | Sand Cat's-tail | 2000 Norfolk |
| Phleum bertolonii | Smaller Cat's-tail | 2000 West Sussex |
| Phyllitis scolopendrium x Asplenium obovatum | Hybrid Fern | 2000 Guernsey |
| Phyteuma orbiculare | Round-headed Rampion | 2000 South Downs |
| Pilosella caespitosa ssp. colliniformis | Yellow Fox-and-cubs | 2000 Morayshire |
| Pilosella peleteriana ssp. peleteriana | Shaggy Mouse-ear Hawkweed | 2000 Guernsey |
| Pilosella peleteriana ssp. subpeleteriana | Shaggy Mouse-ear-hawkweed | 2000 Montgomeryshire |
| Pinguicula vulgaris | Butterwort | 2000 Durham |
| Plantago maritima | Sea Plantain | 2000 West Sussex |
| Plantathera chlorantha | Butterfly Orchid | 2000 Kent |
| Platanthera chlorantha | Greater Butterfly-orchid | 2000 Morayshire |
| Poa bulbosa | Bulbous Meadow Grass | 2000 Frensham Surrey |
| Polycarpon tetraphyllum | Four-leaved Allseed | 2000 Guernsey |
| Polygala calcarea | Chalk Milkwort | 2000 Kent |
| Polystichum aculeatum | Hard Shield-fern | 2000 Morayshire |
| Polystichum aculeatum | Hard Shield Fern | 2000 North East Wales |
| Potamogeton acutifolius | Sharp-leaved Pondweed | 2000 West Sussex |
| Potamogeton crispus | Curled Pondweed | 2000 Leven East, Yorksh |
| Potamogeton lucens | Shining Pondweed | 2000 Leven East, Yorksh |
| Potamogeton natans | Broad-leaved Pondweed | 2000 Leven East, Yorksh |
| Potamogeton pectinatus | Fennel Pondweed | 2000 Leven East, Yorksh |
| Potamogeton trichoides | Hairlike Pondweed | 2000 West Sussex |
| Potentilla neumanniana | Spring Cinquefoil | 2000 Great Orme |
| Potentilla palustris | Marsh Cinquefoil | 2000 Norfolk |
| Potentilla rupestris | Rock Cinquefoil | 2000 Montgomeryshire |
| Prunella grandiflora | Garden Self-Heal | 2000 Morayshire |
| Puccinellia maritima | Common Saltmarsh-grass | 2000 West Sussex |
| Puccinellia maritima | Common Saltmarsh-grass | 2000 Norfolk |
| Pyrola media | Intermediate Wintergreen | 2000 Morayshire |
| Pyrola minor | Common Wintergreen | 2000 Morayshire |
| Pyrola rotundifolia ssp. maritima | Round-leaved Wintergreen | 2000 North East Wales |
| Quercus petraea | Sessile Oak | 2000 North East Wales |
| Radiola linoides | Allseed | 2000 Morayshire |
| Ranunculus circinatus | Fan-leaved Water-crowfoot | 2000 Leven East, Yorksh |
| Ranunculus lingua | Greater Spearwort | 2000 Oxfordshire |
| Ranunculus lingua | Greater Spearwort | 2000 Leven East, Yorksh |
| Ranunculus trichophyllus | Thread-leaved Water Crowfoot | 2000 Oxfordshire |
| Reseda alba | White Mignonette | 2000 Great Orme |
| Ribes spicatum | Downy Currant | 2000 Morayshire |
| Rorippa amphibian | Great Yellow Cress | 2000 Oxfordshire |
| Rorippa palustris | Marsh Yellow Cress | 2000 Oxfordshire |
| Rorippa sylvestris | Creeping Yellow Cress | 2000 Oxfordshire |
| Rosa rubiginosa | Sweet-briar | 2000 Great Orme |
| Rosa sherardii | Sherard's Downy-rose | 2000 North East Wales |
| Rubia peregrina | Madder | 2000 North East Wales |
| Rubus boudiccae | Bramble | 2000 Norfolk |
| Rubus conjungens | Bramble | 2000 Norfolk |
| Rubus lindleianus | Bramble | 2000 Norfolk |
| Rubus polyanthemus | Bramble | 2000 Norfolk |
| Rubus spectabilis | Salmonberry | 2000 Frensham Surrey |
| Rubus vestitus | Bramble | 2000 Norfolk |
| Rumex crispus ssp. littoreus | Curled Dock | 2000 Norfolk |
| Rumex hydrolapathum | Water Dock | 2000 Leven East, Yorksh |
| Rumex obtusifolius x longifolius = R. x hybridus | Hybrid Dock | 2000 Morayshire |
| Rumex rupestris | Shore Dock | 2000 Guernsey |
| Ruppia cirrhosa | Spiral Tassleweed | 2000 Norfolk |
| Sagina nodosa | Knotted Pearlwort | 2000 South Downs |
| Sagina nodosa | Knotted Pearlwort | 2000 North East Wales |
| Sagina subulata | Heath Pearlwort | 2000 Morayshire |
| Sagittaria sagittifolia | Arrowhead | 2000 Leven East, Yorksh |
| Sagittaria sagittifolia | Arrowhead | 2000 West Sussex |
| Salicornia europaea | Common Glasswort | 2000 West Sussex |
| Salicornia ramosissima | Purple Glasswort | 2000 West Sussex |
| Salix purpurea | Purple Willow | 2000 Morayshire |
| Salix triandra | Almond Willow | 2000 Leven East, Yorksh |
| Sanguisorba minor | Salad Burnet | 2000 North East Wales |
| Sarcocornia perennis | Perennial Glasswort | 2000 Norfolk |
| Scabiosa columbaria | Small Scabious | 2000 West Sussex |
| Scrophularia umbrosa | Green Water Figwort | 2000 Norfolk |
| Sedum forsterianum | Rock Stonecrop | 2000 Montgomeryshire |
| Sedum acre | Biting Stonecrop | 2000 North East Wales |
| Sedum album | White Stonecrop | 2000 North East Wales |
| Sedum anglicum | English Stonecrop | 2000 North East Wales |
| Selinum cavifolia | Cambridge Milk Parsley | 2000 Norfolk |
| Senecio erucifolius | Hoary Ragwort | 2000 West Sussex |
| Senecio fluviatile | Broad-leaved Ragwort | 2000 Norfolk |
| Senecio inaequidens | Narrow-leaved Ragwort | 2000 West Sussex |
| Senecio x albescens | Hybrid Ragwort | 2000 North East Wales |
| Seriphidium maritimum | Sea Wormwood | 2000 West Sussex |
| Sesleria caerulea | Blue Moor Grass | 2000 Durham |
| Silene conica | Sand Catchfly | 2000 Guernsey |
| Silene gallica var anglica | Small flowered Catchfly | 2000 Guernsey |
| Silene gallica var quinquevulnera | Small flowered Catchfly | 2000 Guernsey |
| Silene nutans | Nottingham Catchfly | 2000 Guernsey |
| Sium latifolium | Greater Water Parsnip | 2000 West Sussex |
| Sonchus palustris | Marsh Sow-thistle | 2000 Norfolk |
| Sorbus rupicola | Rock Whitebeam | 2000 North East Wales |
| Sparganium angustifolium | Floating Bur-reed | 2000 Morayshire |
| Spartina anglica | Common Cord-grass | 2000 West Sussex |
| Spergularia bocconii | Greek Sea Surrey | 2000 Guernsey |
| Spergularia marina | Lesser Sea-spurrey | 2000 West Sussex |
| Spiraea chamaedryfolia | Bridewort | 2000 Morayshire |
| Spiraea x cinerea | Bridewort | 2000 Frensham Surrey |
| Spiraea x rosalba | Intermediate Bridewort | 2000 Morayshire |
| Stachys arvensis | Field Woundwort | 2000 Morayshire |
| Stellaria palustris | Marsh Stitchwort | 2000 West Sussex |
| Stellaria palustris | Marsh Stitchwort | 2000 Norfolk |
| Stratiotes aloides | Water-soldier | 2000 Norfolk |
| Suaeda vera | Shrubby Seablite | 2000 Norfolk |
| Symphytum tuberosum | Tuberous Comfrey | 2000 Morayshire |
| Teesdalia nudicaulis | Shepherd's Cress | 2000 Frensham Surrey |
| Telekia speciosa | Yellow Oxeye | 2000 Norfolk |
| Thalictrum flavum | Common Meadow-rue | 2000 Norfolk |
| Thalictrum minus | Lesser Meadow-rue | 2000 North East Wales |
| Thelypteris palustris | Marsh Fern | 2000 Norfolk |
| Thesium humifusum | Bastard-toadflax | 2000 South Downs |
| Thymus polytrichus | Thyme | 2000 Durham |
| Torilis nodosa | Knotted Hedge-parsley | 2000 West Sussex |
| Trientalis europaea | Chickweed-wintergreen | 2000 Morayshire |
| Trifolium glomeratum | Clustered Clover | 2000 Guernsey |
| Trifolium occidentale | Western Clover | 2000 Guernsey |
| Trifolium scabrum | Rough Clover | 2000 North East Wales |
| Triglochin maritimum | Sea Arrowgrass | 2000 Norfolk |
| Trollius europaeus | Globeflower | 2000 Montgomeryshire |
| Tuberaria guttata | Spotted Rock Rose | 2000 Guernsey |
| Typha angustifolia | Lesser Reedmace | 2000 Leven East, Yorksh |
| Ulex gallii | Western Gorse | 2000 North East Wales |
| Utricularia stygia | a Bladderwort | 2000 Morayshire |
| Vaccinium microcarpon | Small Cranberry | 2000 Morayshire |
| Valerianella dentata | Narrow-fruited Cornsalad | 2000 South Downs |
| Verbascum lychnitis | White Mullein | 2000 North East Wales |
| Verbena officinalis | Vervain | 2000 West Sussex |
| Veronica catenata | Pink Water-speedwell | 2000 Oxfordshire |
| Veronica officinalis | Heath Speedwell | 2000 West Sussex |
| Veronica spicata ssp. hybrida | Western Spiked Speedwell | 2000 Montgomeryshire |
| Veronica spicata ssp. hybrida | Western Spiked Speedwell | 2000 Great Orme |
| Viola cornuta | Horned Pansy | 2000 Morayshire |
| x Asplenophyllitis jacksonii | Hybrid Spleenwort | 2000 Guernsey |
| x Asplenophyllitis microdon | Guernsey Fern | 2000 Guernsey |