Gardenia jasminoides
Cape Jasmine
Genista pilosa
Hairy Greenweed
Genista tinctoria
Dyer's Greenweed
Gentianella amarella
Autumn Gentian
Geodorum densiflorum
Pink Nodding Orchid
Geranium sanguineum
Bloody Crane's-bill
Geranium x oxonianum
Druce's Crane's-bill
Gerbera jamesonii
Barberton Daisy
Geum rivale
Water Avens
Gladiolus dalenii
Dalen's Gladiolus
Gladiolus illyricus
Wild Gladiolus
Glaucium flavum
Yellow Horned-poppy
Gliricidia sepium
Madre de Cacao
Glycosmis parviflora
Jamaican Mandarin-orange
Gmelina arborea
Beechwood
Goeppertia louisae
Goeppertia majestica
Majestic Prayer Plant
Gomphocarpus physocarpus
Balloon Plant
Gomphrena celosiodes
Gomphrena Weed
Gomphrena globosa
Globe Amaranth
Gomphrena serrata
Prostrate Globe Amaranth
Goodyera repens
Creeping Lady's-tresses
Graptophyllum pictum
Caricature-plant
Grona triflora
Creeping Tick Trefoil
Guizotia abyssinica
Niger
Gymnadenia borealis
Gymnadenia conopsea
Fragrant Orchid
Gymnocarpium robertianum
Limestone Fern
Gymnopilus junonius
Hamelia patens
Firebush
Hammarbya paludosa
Bog Orchid
Handkea utriformis
Mosaic Puffball
Helianthemum nummularium
Common Rock-rose
Helichrysum arenarium
Heliconia monteverdensis
Lobster-claws
Heliconia psittacorum
Parrot's Beak
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
Henosepilachna argus
Bryony Ladybird
Heptapleurum arboricola
Dwarf Umbrella Tree
Heracleum mantegazzianum
Giant Hogweed
Hesperis matronalis
Dame's-violet
Heterotis rotundifolia
Spanish Shawl
Hibiscus tiliaceus
Sea Hibiscus
Hieracium angustatiforme
Small-leaved Hawkweed
Hieracium apheles
Hepste Hawkweed
Hieracium attenboroughianum
Attenborough’s Hawkweed
Hieracium breconense
Brecon Hawkweed
Hieracium breconicola
Beacon's Hawkweed
Hieracium clivicola
Hill Hawkweed
Hieracium discophyllum
Disc-leaved Hawkweed
Hieracium hypochaeroides
Cat's-ear Hawkweed
Hieracium inspissatum
Crass-leaved Hawkweed
Hieracium leyanum
Fat-leaved Hawkweed
Hieracium neocoracinum
Craig Gleisiad Hawkweed
Hieracium reticulatiforme
Reticulate-leaved Hawkweed
Hieracium sabaudum
Autumn Hawkweed
Hieracium sanguineum
Bloody Hawkweed
Hieracium sp.
Hieracium stenopholidium
Western Hawkweed
Hieracium subbritannicum
Limestone Hawkweed
Hieracium tavense
Tawe Hawkweed
Himantoglossum hircinum
Lizard Orchid
Hippeastrum puniceum
Amaryllis Lily
Hippobroma longiflora
Star of Bethlehem
Hirudo medicinalis