Gentiana verna
Spring Gentian
Gentianella amarella
Autumn Gentian
Gentianella campestris
Field Gentian
Gentianella germanica
Chiltern Gentian
Geranium columbinum
Long-stalked Crane's-bill
Geranium dissectum
Cut-leaved Crane's-bill
Geranium lucidum
Shining Crane's-bill
Geranium macrorrhizum
Rock Crane's-bill
Geranium molle
Dove's-foot Crane's-bill
Geranium phaeum
Dusky Crane's-bill
Geranium pratense
Meadow Crane's-bill
Geranium procurrens
Geranium purpureum
Little-Robin
Geranium pusillum
Small-flowered Crane's-bill
Geranium pyrenaicum
Hedgerow Crane's-bill
Geranium robertianum
Herb-Robert
Geranium sanguineum
Bloody Crane's-bill
Geranium subcaulescens
Geranium 'Guiseppii'
Geranium sylvaticum
Wood Crane's-bill
Geranium versicolor
Pencilled Crane's-bill
Geranium x oxonianum
Druce's Crane's-bill
Gerbera jamesonii
Barberton Daisy
Geum rivale
Water Avens
Geum urbanum
Wood Avens
Geum x intermedium
Hybrid Avens
Glaucium flavum
Yellow Horned-poppy
Glebionis segetum
Corn Marigold
Glechoma hederacea
Ground-ivy
Gliricidia sepium
Madre de Cacao
Glycosmis parviflora
Jamaican Mandarin-orange
Glycyrrhiza glabra
Liquorice
Gmelina arborea
Beechwood
Gnaphalium uliginosum
Marsh Cudweed
Gomphocarpus physocarpus
Balloon Plant
Gomphrena celosiodes
Gomphrena Weed
Gomphrena globosa
Globe Amaranth
Gomphrena serrata
Prostrate Globe Amaranth
Graptophyllum pictum
Caricature-plant
Griselinia littoralis
New Zealand Broadleaf
Grona triflora
Creeping Tick Trefoil
Guizotia abyssinica
Niger
Gunnera tinctoria
Giant-rhubarb
Hamamelis spp.
Witch-hazel
Hamelia patens
Firebush
Hedera helix sens lat
Ivy
Hedera hibernica
Atlantic Ivy
Helianthemum apenninum
White Rock-rose
Helianthemum nummularium
Common Rock-rose
Helianthemum oelandicum
Hoary Rock-rose
Helianthus annuus
Sunflower
Helichrysum arenarium
Helichrysum italicum
Curry-plant
Heliotropium indicum
Indian Heliotrope
Helleborus argutifolius
Corsican Hellebore
Helleborus foetidus
Stinking Hellebore
Helleborus kochii
Helleborus (kochii)
Helleborus niger
Christmas-rose
Helleborus orientalis
Lenten-rose
Helleborus viridis
Green Hellebore
Helminthotheca echioides
Bristly Oxtongue
Helosciadium inundatum
Lesser Marshwort
Helosciadium nodiflorum
Fool's-water-cress
Hepatica nobilis
Liverleaf
Heptapleurum arboricola
Dwarf Umbrella Tree
Heracleum mantegazzianum
Giant Hogweed
Heracleum sphondylium
Hogweed
Hesperis matronalis
Dame's-violet
Heterotis rotundifolia
Spanish Shawl
Hevea brasiliensis
Pará Rubber Tree
Hibiscus tiliaceus
Sea Hibiscus