Glyceria fluitans
Floating Sweet-grass
Glycosmis parviflora
Jamaican Mandarin-orange
Gnaphalium uliginosum
Marsh Cudweed
Goeppertia majestica
Majestic Prayer Plant
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
Gymnadenia conopsea
Fragrant Orchid
Gymnocarpium dryopteris
Oak Fern
Gymnocarpium robertianum
Limestone Fern
Hammarbya paludosa
Bog Orchid
Hedera helix sens lat
Ivy
Hedera hibernica
Atlantic Ivy
Helianthemum nummularium
Common Rock-rose
Helianthus annuus
Sunflower
Heliconia psittacorum
Parakeetflower
Helleborus foetidus
Stinking Hellebore
Helleborus viridis
Green Hellebore
Helminthotheca echioides
Bristly Oxtongue
Helosciadium inundatum
Lesser Marshwort
Helosciadium nodiflorum
Fool's-water-cress