Hydrocotyle vulgaris
Marsh Pennywort
Hygrocybe conica
Blackening Wax Cap
Hygrocybe miniata
Hygrocybe psittacina
Parrot Waxcap
Hygrocybe sp.
Hygrocybe virginea
Snowy Waxcap
Hylotelephium telephium
Orpine
Hymenophyllum tunbrigense
Tunbridge Filmy-fern
Hymenophyllum wilsonii
Wilson's Filmy-fern
Hypericum androsaemum
Tutsan
Hypericum hirsutum
Hairy St John's-wort
Hypericum humifusum
Trailing St John's-wort
Hypericum pulchrum
Slender St John's-wort
Hypericum x inodorum
Tall Tutsan
Hypholoma fasciculare
Sulphur Tuft
Hypochaeris radicata
Cat's-ear
Hypogymnia tubulosa
Hypopitys monotropa
Yellow Bird's-nest
Ilex aquifolium
Holly
Impatiens glandulifera
Indian Balsam
Inonotus dryadeus
Oak Bracket
Inula helenium
Elecampane
Iris pseudacorus
Yellow Iris
Isoetes lacustris
Quillwort