Abutilon
Acacia auriculiformis
Ear-pod Wattle
Acacia mearnsii
Black Wattle
Acaena ovalifolia
Two-spined Acaena
Acanthus mollis
Bear's-breech
Acer campestre
Field Maple
Acer platanoides
Norway Maple
Acer pseudoplatanus
Sycamore
Achillea millefolium
Yarrow
Achillea ptarmica
Sneezewort
Acmella caulirhiza
Aaku Mella
Aconitum napellus
Monk's-hood
Aconitum x stoerkianum
Hybrid Monk's-hood
Adoxa moschatellina
Moschatel
Aegonychon purpureocaeruleum
Purple Gromwell
Aegopodium podagraria
Ground-elder
Aesculus hippocastanum
Horse-chestnut
Agave parviflora
Ageratum conyzoides
Billygoat-weed
Agrimonia eupatoria
Agrimony
Agrimonia procera
Fragrant Agrimony
Agrostemma githago
Corncockle
Agrostis capillaris
Common Bent
Aira caryophyllea
Silver Hair-grass
Aira praecox
Early Hair-grass
Ajuga reptans
Bugle
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
Alliaria petiolata
Garlic Mustard
Allium ampeloprasum
Wild Leek
Allium cepa
Onion
Allium oleraceum
Field Garlic
Allium siculum
Honey Garlic
Allium trifoliatum
Hirsute Garlic
Allium triquetrum
Three-cornered Garlic
Allium ursinum
Ramsons
Alnus glutinosa
Alder
Alopecurus aequalis
Orange Foxtail
Alopecurus geniculatus
Marsh Foxtail
Alopecurus pratensis
Meadow Foxtail
Alpinia purpurata
Red Ginger
Alysicarpus vaginalis
Alyce Clover
Amelanchier lamarckii
Juneberry
Ammi majus
Bullwort
Ammophila arenaria
Marram
Amorphophallus prainii
Voodoo Lily
Amsinckia micrantha
Common Fiddleneck
Anacamptis pyramidalis
Pyramidal Orchid
Anaphalis margaritacea
Pearly Everlasting
Andromeda polifolia
Bog-rosemary
Angelica sylvestris
Wild Angelica
Antennaria dioica
Mountain Everlasting
Anthoxanthum odoratum
Sweet Vernal-grass
Anthriscus caucalis
Bur Chervil
Anthriscus sylvestris
Cow Parsley
Anthurium schlechtendalii
Pheasant's Tail
Anthyllis vulneraria
Kidney Vetch
Aphanes arvensis
Parsley-piert
Aquilegia vulgaris
Columbine
Arabidopsis thaliana
Thale Cress
Arabis hirsuta
Hairy Rock-cress
Arachnothryx leucophylla
Bush Pentas
Arctium minus
Lesser Burdock
Arctium minus sens. str.
Lesser Burdock
Arctium nemorosum
Wood Burdock
Arctium tomentosum
Woolly Burdock