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
Holmskioldia sanguinea
Chinese Hat Plant
Homalomena rubescens
Shield Plant
Hordeum vulgare
Six-rowed Barley
Hornungia petraea
Hutchinsia
Houttuynia cordata
Fish-plant
Huperzia selago
Fir Clubmoss
Hyacinthoides non-scripta
Bluebell
Hydrangea macrophylla
Hydrangea
Hydrocotyle vulgaris
Marsh Pennywort
Hylotelephium telephium
Orpine
Hymenocallis fragrans
Spider Lily
Hymenophyllum tunbrigense
Tunbridge Filmy-fern
Hyophorbe lagenicaulis
Bottle Palm
Hyoscyamus niger
Henbane
Hypericum humifusum
Trailing St John's-wort