Glebionis segetum
Corn Marigold
Glechoma hederacea
Ground-ivy
Gliricidia sepium
Madre de Cacao
Glycyrrhiza glabra
Liquorice
Gnaphalium uliginosum
Marsh Cudweed
Goeppertia louisae
Gomphrena globosa
Globe Amaranth
Gomphrena serrata
Prostrate Globe Amaranth
Goodyera repens
Creeping Lady's-tresses
Grona triflora
Creeping Tick Trefoil
Guizotia abyssinica
Niger
Gunnera tinctoria
Giant-rhubarb
Gymnadenia borealis
Heath Fragrant-orchid
Gymnadenia conopsea
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
Helianthemum apenninum
White Rock-rose
Helianthemum nummularium
Common Rock-rose
Helianthemum oelandicum
Hoary Rock-rose
Helianthus annuus
Sunflower
Helichrysum arenarium
Helichrysum italicum
Curry-plant
Heliconia monteverdensis
Lobster-claws
Heliconia psittacorum
Parrot's Beak
Heliconia rostrata
Hanging Lobster Claw
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
Hellenia speciosa
Crêpe Ginger
Helminthotheca echioides
Bristly Oxtongue
Helosciadium inundatum
Lesser Marshwort
Helosciadium nodiflorum
Fool's-water-cress
Hemerocallis
Daylily
Hepatica nobilis
Liverleaf
Heracleum sphondylium
Hogweed
Herminium monorchis
Musk Orchid
Hesperis matronalis
Dame's-violet
Heterotis rotundifolia
Spanish Shawl
Hieracium agg
A Hawkweed
Hieracium anglicum agg.
Hawkweed (anglicum agg.)
Hieracium breconicola
Beacon's Hawkweed
Hieracium cillense
Craig y Cilau Hawkweed
Hieracium daedalolepioides
Petite-leaved Hawkweed
Hieracium discophyllum
Disc-leaved Hawkweed
Hieracium inspissatum
Crass-leaved Hawkweed
Hieracium lanatum
Hieracium leyanum
Fat-leaved Hawkweed
Hieracium sect. Hieracioides
Hieracium sect. Oreadea
Hieracium sect. Sabauda
Hieracium sect. Stelligera
Hawkweed (Stelligera)
Hieracium sect. Vulgata
Hieracium spp
Hieracium subbritannicum
Limestone Hawkweed
Himantoglossum hircinum
Lizard Orchid
Hippeastrum
Amaryllis
Hippeastrum puniceum
Amaryllis Lily
Hippobroma longiflora
Star of Bethlehem
Hippocrepis comosa
Horseshoe Vetch
Hippophae rhamnoides
Sea-buckthorn
Hirschfeldia incana
Hoary Mustard
Holmskioldia sanguinea
Chinese Hat Plant