Acer campestre
Field Maple
Achillea ptarmica
Sneezewort
Actaea spicata
Baneberry
Adiantum capillus-veneris
Maidenhair Fern
Adoxa moschatellina
Moschatel
Aegonychon purpureocaeruleum
Purple Gromwell
Agrimonia eupatoria
Agrimony
Agrimonia procera
Fragrant Agrimony
Agrostis capillaris
Common Bent
Aira caryophyllea
Silver Hair-grass
Aira praecox
Early Hair-grass
Ajuga reptans
Bugle
Alchemilla alpina
Alpine Lady's-mantle
Alchemilla filicaulis
Hairy Lady's-mantle
Alchemilla glabra
Smooth Lady's-mantle
Alchemilla xanthochlora
Intermediate Lady's-mantle
Alisma lanceolatum
Narrow-leaved Water-plantain
Alisma plantago-aquatica
Water-plantain
Alliaria petiolata
Garlic Mustard
Allium oleraceum
Field Garlic
Allium schoenoprasum
Chives
Allium ursinum
Ramsons
Allium vineale
Wild Onion
Alnus glutinosa
Alder
Alopecurus aequalis
Orange Foxtail
Alopecurus geniculatus
Marsh Foxtail
Alopecurus pratensis
Meadow Foxtail
Althaea officinalis
Marsh-mallow
Ammophila arenaria
Marram
Anacamptis morio
Green-winged Orchid
Anacamptis pyramidalis
Pyramidal Orchid
Andromeda polifolia
Bog-rosemary
Anemone nemorosa
Wood Anemone
Angelica sylvestris
Wild Angelica
Antennaria dioica
Mountain Everlasting
Anthoxanthum odoratum
Sweet Vernal-grass
Anthriscus caucalis
Bur Chervil
Anthriscus sylvestris
Cow Parsley
Anthyllis vulneraria
Kidney Vetch
Aphanes arvensis
Parsley-piert
Aphanes arvensis agg.
Parsley-piert
Aphanes australis
Slender Parsley-piert
Aquilegia vulgaris
Columbine
Arabidopsis petraea
Northern Rock-cress
Arabidopsis thaliana
Thale Cress
Arabis hirsuta
Hairy Rock-cress
Arabis scabra
Bristol Rock-cress
Arbutus unedo
Strawberry-tree
Arctium minus
Lesser Burdock
Arctium minus sens. str.
Lesser Burdock
Arenaria serpyllifolia
Thyme-leaved Sandwort
Armeria maritima
Thrift
Arrhenatherum elatius
False Oat-grass
Arum italicum
Italian Lords-and-Ladies
Arum maculatum
Lords-and-Ladies
Asperula cynanchica
Squinancywort
Asplenium adiantum-nigrum
Black Spleenwort
Asplenium ceterach
Rustyback
Asplenium marinum
Sea Spleenwort
Asplenium onopteris
Irish Spleenwort
Asplenium ruta-muraria
Wall-rue
Asplenium scolopendrium
Hart's-tongue
Asplenium trichomanes
Maidenhair Spleenwort
Asplenium viride
Green Spleenwort
Astragalus glycyphyllos
Wild Liquorice
Atriplex glabriuscula
Babington's Orache
Atriplex laciniata
Frosted Orache
Atriplex littoralis
Grass-leaved Orache
Atriplex portulacoides
Sea-purslane
Atriplex prostrata
Spear-leaved Orache