Hieracium apheles
Hepste Hawkweed
Hieracium argillaceum
Southern Hawkweed
Hieracium attenboroughianum
Attenborough’s Hawkweed
Hieracium breconense
Brecon Hawkweed
Hieracium breconicola
Beacon's Hawkweed
Hieracium cillense
Craig y Cilau Hawkweed
Hieracium clivicola
Hill Hawkweed
Hieracium daedalolepioides
Petite-leaved Hawkweed
Hieracium discophyllum
Disc-leaved Hawkweed
Hieracium hypochaeroides
Cat's-ear Hawkweed
Hieracium inspissatum
Crass-leaved Hawkweed
Hieracium lanatum
Hieracium leyanum
Fat-leaved Hawkweed
Hieracium maculatum
Spotted Hawkweed
Hieracium neocoracinum
Craig Gleisiad Hawkweed
Hieracium repandulare
Hieracium reticulatiforme
Reticulate-leaved Hawkweed
Hieracium sabaudum
Autumn Hawkweed
Hieracium sanguineum
Bloody Hawkweed
Hieracium sect. Hieracioides
Hieracium sect. Oreadea
Hieracium sect. Sabauda
Hieracium sect. Stelligera
Hawkweed (Stelligera)
Hieracium sect. Vulgata
Hieracium sp.
Hieracium spp
Hieracium stenopholidium
Western Hawkweed
Hieracium subbritannicum
Limestone Hawkweed
Hieracium tavense
Tawe Hawkweed
Himantoglossum hircinum
Lizard Orchid
Hippeastrum
Amaryllis
Hippeastrum puniceum
Amaryllis Lily
Hippobroma longiflora
Star of Bethlehem
Hippocrepis comosa
Horseshoe Vetch
Hippophae rhamnoides
Sea-buckthorn
Hippuris vulgaris
Mare's-tail
Hirschfeldia incana
Hoary Mustard
Holcus lanatus
Yorkshire-fog
Holmskioldia sanguinea
Chinese Hat Plant
Homalia trichomanoides
Blunt Feather-moss
Homalomena rubescens
Shield Plant
Honckenya peploides
Sea Sandwort
Hopea ferrea
Malut
Hordeum distichon
Two-rowed Barley
Hordeum murinum
Wall Barley
Hordeum secalinum
Meadow Barley
Hordeum vulgare
Six-rowed Barley
Hornungia petraea
Hutchinsia
Hottonia palustris
Water-violet
Houttuynia cordata
Fish-plant
Humulus lupulus
Hop
Huperzia selago
Fir Clubmoss
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
Hylotelephium telephium
Orpine
Hymenocallis fragrans
Spider Lily
Hymenophyllum tunbrigense
Tunbridge Filmy-fern
Hymenophyllum wilsonii
Wilson's Filmy-fern
Hyophorbe lagenicaulis
Bottle Palm
Hyoscyamus niger
Henbane