Atriplex laciniata
Frosted Orache
Atriplex littoralis
Grass-leaved Orache
Atriplex portulacoides
Sea-purslane
Atriplex prostrata
Spear-leaved Orache
Aubrieta deltoidea
Aubretia
Auricularia auricula-judae
Jelly Ear
Avena sativa
Oat
Baldellia ranunculoides
Lesser Water-plantain
Ballota nigra
Black Horehound
Barbarea verna
American Winter-cress
Barbarea vulgaris
Winter-cress
Bartramia stricta
Bartramia stricta and Riccia subbifurca
Bellis perennis
Daisy
Berberis vulgaris
Barberry
Berula erecta
Lesser Water-parsnip
Beta vulgaris
Sea Beet
Betonica officinalis
Betony
Betula pendula
Silver Birch
Betula pubescens
Downy Birch
Bidens cernua
Nodding Bur-marigold
Bidens tripartita
Trifid Bur-marigold
Bistorta officinalis
Common Bistort
Bistorta vivipara
Alpine Bistort