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
Honckenya peploides
Sea Sandwort
Hordeum distichon
Two-rowed Barley
Hornungia petraea
Hutchinsia
Houttuynia cordata
Fish-plant
Humulus lupulus
Hop
Hyacinthoides hispanica
Spanish Bluebell
Hyacinthoides italica
Italian Bluebell
Hyacinthoides non-scripta
Bluebell
Hyacinthoides x massartiana
Garden Bluebell
Hydrangea macrophylla
Hydrangea
Hydrangea paniculata
Hydrangea (paniculata)
Hydrangea petiolaris
Climbing Hydrangea
Hydrangea quercifolia
Oak-leaved Hydrangea
Hydrangea sp
Hydrocharis morsus-ranae
Frogbit
Hydrocotyle hirta
Hydrocotyle vulgaris
Marsh Pennywort