Gentianella germanica
Chiltern Gentian
Geodorum densiflorum
Pink Nodding Orchid
Geranium columbinum
Long-stalked Crane's-bill
Geranium molle
Dove's-foot Crane's-bill
Geranium pratense
Meadow Crane's-bill
Geranium procurrens
Geranium purpureum
Little-Robin
Geranium robertianum
Herb-Robert
Geranium sanguineum
Bloody Crane's-bill
Geum rivale
Water Avens
Geum x intermedium
Hybrid Avens
Gladiolus dalenii
Dalen's Gladiolus
Gladiolus papilio
Butterfly Sword Lily
Glaucium flavum
Yellow Horned-poppy
Glebionis segetum
Corn Marigold
Glechoma hederacea
Ground-ivy
Gliricidia sepium
Madre de Cacao
Glyceria declinata
Small Sweet-grass
Glyceria fluitans
Floating Sweet-grass
Glycosmis parviflora
Jamaican Mandarin-orange
Gnaphalium uliginosum
Marsh Cudweed
Goeppertia louisae
Gomphrena celosiodes
Gomphrena Weed
Gomphrena globosa
Globe Amaranth
Gomphrena serrata
Prostrate Globe Amaranth
Guizotia abyssinica
Niger
Gymnadenia borealis
Heath Fragrant-orchid
Gymnadenia conopsea
Fragrant Orchid
Gymnadenia conopsea agg
Chalk Fragrant Orchid
Gymnadenia densiflora
Marsh Fragrant-orchid
Hamamelis spp.
Witch-hazel
Hamelia patens
Firebush
Hammarbya paludosa
Bog Orchid
Hedera helix sens lat
Ivy
Hedera hibernica
Atlantic Ivy
Helichrysum arenarium
Helichrysum italicum
Curry-plant
Heliconia monteverdensis
Lobster-claws
Heliconia rostrata
Hanging Lobster Claw
Heliotropium indicum
Indian Heliotrope
Helleborus foetidus
Stinking Hellebore
Helleborus viridis
Green Hellebore
Hellenia speciosa
Crêpe Ginger
Helminthotheca echioides
Bristly Oxtongue
Helosciadium inundatum
Lesser Marshwort
Helosciadium nodiflorum
Fool's-water-cress
Heracleum mantegazzianum
Giant Hogweed
Heracleum sphondylium
Hogweed
Hesperis matronalis
Dame's-violet
Hieracium agg
A Hawkweed
Hieracium angustatiforme
Small-leaved Hawkweed
Hieracium argillaceum
Southern Hawkweed
Hieracium attenboroughianum
Attenborough’s Hawkweed
Hieracium breconense
Brecon Hawkweed
Hieracium clivicola
Hill Hawkweed
Hieracium daedalolepioides
Petite-leaved Hawkweed
Hieracium hypochaeroides
Cat's-ear Hawkweed
Hieracium lanatum
Hieracium repandulare
Hieracium sabaudum
Autumn Hawkweed
Hieracium sanguineum
Bloody Hawkweed
Hieracium sect. Hieracioides
Hieracium sect. Oreadea
Hieracium sect. Sabauda
Hieracium sp.
Hieracium spp
Hieracium subbritannicum
Limestone Hawkweed
Hieracium tavense
Tawe Hawkweed
Himantoglossum hircinum
Lizard Orchid
Hippeastrum puniceum
Amaryllis Lily