• Filipendula vulgaris Dropwort
  
• Foeniculum vulgare Fennel
  
• Fragaria vesca Wild Strawberry
  
• Frangula alnus Alder Buckthorn
  
• Fraxinus excelsior Ash
  
• Fuchsia magellanica Fuchsia
  
• Fumaria bastardii Tall Ramping-fumitory
  
• Fumaria capreolata White Ramping-fumitory
  
• Fumaria officinalis Common Ramping-fumitory
  
• Galeopsis tetrahit Hemp-nettle, Common
  
• Galium aparine Cleavers
  
• Galium boreale Northern Bedstraw
  
• Galium mollugo Hedge Bedstraw
  
• Galium odoratum Woodruff
  
• Galium palustre Marsh Bedstraw, Common
  
• Galium saxatile Heath Bedstraw
  
• Galium verum Ladies Bedstraw
  
• Gaultheria mucronata Prickly Heath
  
• Gentiana verna Gentian, Spring
  
• Gentianella amarella Autumn Gentian
  
• Gentianella campestris Field Gentian
  
• Geranium columbinum Long-stalked Crane's-bill
  
• Geranium dissectum Cranen's-bill, Cut-leaved
  
• Geranium lucidum Shining Crane's-bill
  
• Geranium molle Dove's-foot Crane's-bill
  
• Geranium pyrenaicum Hedgerow Crane's-bill
  
• Geranium robertianum Herb-robert
  
• Geranium sanguineum Bloody Crane's-bill
  
• Geum rivale Water Avens
  
• Geum urbanum Wood Avens
  
• Glaucium flavum Horned Poppy
  
• Glaux maritima Sea-milkwort
  
• Glechoma hederacea Ground-ivy
  
• Gnaphalium sylvaticum Heath Cudweed
  
• Gnaphalium uliginosum Marsh Cudweed
  
• Gymnadenia conopsea Fragrant Orchid
  
• Hammarbya paludosa Bog Orchid
  
• Hedera helix Ivy
  
• Helianthemum oelandicum Burren Rockrose
  
• Heracleum mantegazzianum Giant Hogweed
  
• Heracleum sphondylium Hogweed
  
• Hesperis matronalis Dame's Violet
  
• Hieracium sp. Hawkweed
  
• Hippuris vulgaris Mare's-tail
  
• Honckenya peploides Sandwort, Sea
  
• Humulus lupulus Hop
  
• Hyacinthoides hispanica Spanish Bluebell
  
• Hyacinthoides non-scripta Bluebell
  
• Hydrilla verticillata Esthwaite Waterweed
  
• Hydrocharis morsus-ranae Frogbit