Galium sterneri
Limestone Bedstraw
Galium uliginosum
Fen Bedstraw
Gaura lindheimeri
Geranium molle
Dove's-foot Crane's-bill
Geranium x oxonianum
Druce's Crane's-bill
Gymnadenia borealis
Heath Fragrant-orchid
Helianthemum apenninum
White Rock-rose
Helleborus niger
Christmas-rose
Helosciadium inundatum
Lesser Marshwort
Helosciadium nodiflorum
Fool's-water-cress
Hesperis matronalis
Dame's-violet
Himantoglossum hircinum
Lizard Orchid
Honckenya peploides
Sea Sandwort
Hornungia petraea
Hutchinsia
Houttuynia cordata
Fish-plant
Hyacinthoides hispanica
Spanish Bluebell
Hyacinthoides non-scripta
Bluebell
Hydrangea petiolaris
Climbing Hydrangea
Iberis amara
Wild Candytuft
Ilex aquifolium
Holly
Illecebrum verticillatum
Coral-necklace
Impatiens glandulifera
Indian Balsam
Koenigia polystachya
Himalayan Knotweed
Lathraea squamaria
Toothwort