Hieracium sect. Sabauda
Hieracium spp
Himantoglossum hircinum
Lizard Orchid
Hordeum distichon
Two-rowed Barley
Hordeum murinum
Wall Barley
Hordeum secalinum
Meadow Barley
Hornungia petraea
Hutchinsia
Humulus lupulus
Hop
Hyacinthoides hispanica
Spanish Bluebell
Hyacinthoides italica
Italian Bluebell
Hyacinthoides non-scripta
Bluebell
Hyacinthoides x massartiana
Garden Bluebell
Hydrocotyle vulgaris
Marsh Pennywort
Hylotelephium telephium
Orpine
Hypericum elodes
Marsh St John's-wort
Hypericum hirsutum
Hairy St John's-wort
Hypericum humifusum
Trailing St John's-wort
Hypericum maculatum
Imperforate St John's-wort
Hypericum perforatum
Perforate St John's-wort
Hypericum pulchrum
Slender St John's-wort
Hypochaeris maculata
Spotted Cat's-ear
Hypochaeris radicata
Cat's-ear
Hypopitys monotropa
Yellow Bird's-nest
Iberis amara
Wild Candytuft