Hornungia petraea
Hutchinsia
Houttuynia cordata
Fish-plant
Huperzia selago
Fir Clubmoss
Hyacinthoides non-scripta
Bluebell
Hylotelephium telephium
Orpine
Hymenophyllum tunbrigense
Tunbridge Filmy-fern
Hyoscyamus niger
Henbane
Hypericum humifusum
Trailing St John's-wort
Hypericum x inodorum
Tall Tutsan
Hypopitys monotropa
Yellow Bird's-nest
Illecebrum verticillatum
Coral-necklace
Impatiens noli-tangere
Touch-me-not Balsam
Impatiens parviflora
Small Balsam
Inonotus hispidus
Shaggy Bracket
Inula helenium
Elecampane
Isoetes lacustris
Quillwort
Jaapiella veronicae
Jasione montana
Sheep's-bit
Juncus bulbosus
Bulbous Rush
Juncus effusus
Soft-rush
Juncus Tenuis
Slender Rush
Lactuca saligna
Least Lettuce
Lamium amplexicaule
Henbit Dead-nettle
Larix decidua
European Larch