• Species and lower taxa
• Higher taxa
• Common names

Halimione portulacoides – synonym of Atriplex portulacoides

Hammarbya paludosa

Hedera helix

Helianthemum oelandicum

Helleborine latifolia – synonym of Epipactis helleborine

Helleborine palustris – synonym of Epipactis palustris

Heracleum mantegazzianum

Heracleum sphondylium

Hesperis matronalis

Hieracium pilosella – synonym of Pilosella officinarum

Hieracium sp.

Hippuris vulgaris

Honckenya peploides

Humulus lupulus

Hyacinthoides hispanica

Hyacinthoides non-scripta

Hydrilla verticillata

Hydrocharis morsus-ranae

Hydrocotyle vulgaris

Hyoscyamus niger

Hypericum androsaemum

Hypericum elodes

Hypericum humifusum

Hypericum maculatum

Hypericum perforatum

Hypericum pulchrum

Hypericum tetrapterum

Hypochaeris radicata