Acer campestre
Field Maple
Acer platanoides
Norway Maple
Acer pseudoplatanus
Sycamore
Achillea millefolium
Yarrow
Achillea ptarmica
Sneezewort
Aconitum napellus
Monk's-hood
Aconitum x stoerkianum
Hybrid Monk's-hood
Actaea spicata
Baneberry
Adiantum capillus-veneris
Maidenhair Fern
Adoxa moschatellina
Moschatel
Aegonychon purpureocaeruleum
Purple Gromwell
Aegopodium podagraria
Ground-elder
Aesculus hippocastanum
Horse-chestnut
Agrimonia eupatoria
Agrimony
Agrimonia procera
Fragrant Agrimony
Agrostis capillaris
Common Bent
Ajuga chamaepitys
Ground-pine
Ajuga reptans
Bugle
Alchemilla alpina
Alpine Lady's-mantle
Alchemilla filicaulis
Hairy Lady's-mantle
Alchemilla glabra
Smooth Lady's-mantle
Alchemilla mollis
Garden Lady's-mantle
Alchemilla xanthochlora
Intermediate Lady's-mantle
Alisma lanceolatum
Narrow-leaved Water-plantain
Alisma plantago-aquatica
Water-plantain
Allium ampeloprasum
Allium cepa
Onion
Allium oleraceum
Field Garlic
Allium paradoxum
Few-flowered Garlic
Allium roseum
Rosy Garlic
Allium schoenoprasum
Chives
Allium triquetrum
Three-cornered Garlic
Allium ursinum
Ramsons
Allium vineale
Wild Onion
Alnus glutinosa
Alder
Alopecurus geniculatus
Marsh Foxtail
Alopecurus pratensis
Meadow Foxtail
Althaea officinalis
Marsh-mallow
Ammophila arenaria
Marram
Anacamptis morio
Green-winged Orchid
Anacamptis pyramidalis
Pyramidal Orchid
Anaphalis margaritacea
Pearly Everlasting
Andromeda polifolia
Bog-rosemary
Anemone nemorosa
Wood Anemone
Angelica sylvestris
Wild Angelica
Antennaria dioica
Mountain Everlasting
Anthoxanthum odoratum
Sweet Vernal-grass
Anthriscus sylvestris
Cow Parsley
Anthyllis vulneraria
Kidney Vetch
Antirrhinum majus
Snapdragon
Aquilegia vulgaris
Columbine
Arabidopsis petraea
Northern Rock-cress
Arabis scabra
Bristol Rock-cress
Arbutus unedo
Strawberry-tree
Armeria maritima
Thrift
Armoracia rusticana
Horse-radish
Arrhenatherum elatius
False Oat-grass
Artemisia vulgaris
Mugwort
Arum italicum
Italian Lords-and-Ladies
Arum maculatum
Lords-and-Ladies
Asparagus officinalis
Garden Asparagus
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 septentrionale
Forked Spleenwort
Asplenium trichomanes
Maidenhair Spleenwort