• Atriplex patula Orache, Common
  
• Atriplex portulacoides Sea-purslane
  
• Atriplex prostrata Spear-leaved Orache
  
• Baldellia ranunculoides Lesser Water-plantain
  
• Barbarea intermedia Winter-cress, Medium-flowered
  
• Barbarea vulgaris Winter-cress
  
• Bellis perennis Daisy
  
• Berberis vulgaris Barberry
  
• Berula erecta Lesser Water-parsnip
  
• Beta vulgaris Sea Beet
  
• Betula pendula Silver Birch
  
• Betula pubescens Common Birch
  
• Bidens cernua Bur-marigold
  
• Bidens tripartita Bur-marigold
  
• Blackstonia perfoliata Yellow-wort
  
• Brassica nigra Black Mustard
  
• Brassica rapa Turnip, Wild
  
• Buddleja davidii Butterfly-bush
  
• Butomus umbellatus Flowering rush
  
• Cakile maritima Sea Rocket
  
• Callitriche brutia Pedunculate Water-starwort
  
• Callitriche obtusangula Blunt-fruited Water-starwort
  
• Callitriche palustris Narrow-fruited Water-starwort
  
• Callitriche platycarpa Water-starwort, Various-leaved
  
• Callitriche stagnalis Common Water-starwort
  
• Calluna vulgaris Heather
  
• Caltha palustris Marsh-marigold
  
• Calystegia pulchra Bindweed, Hairy
  
• Calystegia sepium Hedge Bindweed
  
• Calystegia silvatica Large Bindweed
  
• Calystegia soldanella Sea Bindweed
  
• Campanula rotundifolia Harebell
  
• Campanula trachelium Nettle-leaved Bellflower
  
• Capsella bursa-pastoris Shepherd's Purse
  
• Cardamine flexuosa Bitter-cress, Wavy
  
• Cardamine hirsuta Bitter-cress, Hairy
  
• Cardamine impatiens Bitter-cress, Narrow-leaved
  
• Cardamine pratensis Lady's Smock
  
• Carduus nutans Thistle
  
• Carduus tenuiflorus Thistle
  
• Carlina vulgaris Carline Thistle
  
• Centaurea cyanus Cornflower
  
• Centaurea nigra Knapweed
  
• Centaurea scabiosa
• Centaurium erythraea Common Centaury
  
• Centranthus ruber Red Valerian
  
• Cephalanthera longifolia Narrow-leaved helleborine
  
• Cerastium arvense Field Mouse-ear
  
• Cerastium diffusum Mouse-ear, Sea
  
• Cerastium fontanum Common Mouse-ear