H

Name	Species	Common Name
Hammarbya	paludosa	Bog Orchid
Hedera	helix	Ivy
Helianthemum	apenninum	White Rock-rose
Helianthemum	nummularium	Common Rock-rose
Helianthemum	oelandicum	Hoary Rock-rose
Helictotrichon	pratense	Meadow Oat-grass
Helictotrichon	pubescens	Downy Oat-grass
Helleborus	foetidus	Stinking Hellebore
Helleborus	viridis	Green Hellebore
Heracleum	sphondylium	Hogweed
Herminium	monorchis	Musk Orchid
Herniaria	ciliolata	Fringed Rupturewort
Herniaria	glabra	Smooth Rupturewort
Hieracium	brittanica	Hawkweed
Hieracium	umbellatum	Hawkweed
Hieracium	agg.	Hawkweeds
Hierochloe	odorata	Holy-grass
Himantoglossum	hircinum	Lizard Orchid
Hippocrepis	comosa	Horseshoe Vetch
Hippophae	rhamnoides	Sea-buckthorn
Hippuris	vulgaris	Mare’s-tail
Holcus	lanatus	Yorkshire-fog
Holcus	mollis	Creeping Soft-grass
Honckenya	peploides	Sea Sandwort
Hordelymus	europaeus	Wood Barley
Hordeum	marinum	Sea Barley
Hordeum	murinum	Wall Barley
Hordeum	secalinum	Meadow Barley
Hornungia	petraea	Hutchinsia
Hottonia	palustris	Water-violet
Humulus	lupulus	Hop
Huperzia	selago	Fir Clubmoss
Hyacinthoides	non-scripta	Bluebell
Hydrilla	verticillata	Esthwaite Waterweed
Hydrocharis	morsus-ranae	Frogbit
Hydrocotyle	vulgaris	Marsh Pennywort
Hymenophyllum	tunbrigense	Tunbridge Filmy-fern
Hymenophyllum	wilsonii	Wilson’s Filmy-fern
Hyoscyamus	niger	Henbane
Hypericum	androsaemum	Tutsan
Hypericum	elodes	Marsh St John’s Wort
Hypericum	hirsutum	Hairy St John’s Wort
Hypericum	humifusum	Trailing St John’s Wort
Hypericum	linariifolium	Toadflax-leaved St John's Wort
Hypericum	maculatum	Imperforate St John’s Wort
Hypericum	montanum ssp. obtusiusculum	Pale St John’s Wort
Hypericum	montanum ssp. maculatum	Pale St John’s Wort
Hypericum	perforatum	Perforate St John’s Wort
Hypericum	pulchrum	Slender St John’s Wort
Hypericum	tetrapterum	Square-stalked St John's Wort
Hypericum	undulatum	Wavy St John’s Wort
Hypochaeris	glabra	Smooth Cat’s-ear
Hypochaeris	maculata	Spotted Cat’s-ear
Hypochaeris	radicata	Cat’s-ear