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
Heptapleurum arboricola
Dwarf Umbrella Tree
Heracleum mantegazzianum
Giant Hogweed
Heracleum sphondylium
Hogweed
Hesperis matronalis
Dame's-violet
Heterotis rotundifolia
Spanish Shawl
Hibiscus tiliaceus
Sea Hibiscus
Hieracium anglicum agg.
Hawkweed (anglicum agg.)
Hieracium cillense
Craig y Cilau Hawkweed
Hieracium lanatum
Hieracium maculatum
Spotted Hawkweed
Hieracium repandulare
Repand-leaved Hawkweed
Hieracium sect. Sabauda
Hieracium sect. Stelligera
Hawkweed (Stelligera)
Hieracium sect. Vulgata
Hieracium sp.