Lathyrus sylvestris
Narrow-leaved Everlasting-pea
Lathyrus vernus
Spring Pea
Lemna minor
Common Duckweed
Lemna trisulca
Ivy-leaved Duckweed
Lemna valdiviana
Leontodon hispidus
Rough Hawkbit
Leontodon saxatilis
Lesser Hawkbit
Leonurus cardiaca
Motherwort
Lepidium didymum
Lesser Swine-cress
Lepidium draba
Hoary Cress
Lepidium heterophyllum
Smith's Pepperwort
Lepidium latifolium
Dittander
Lepidium ruderale
Narrow-leaved Pepperwort
Lepidium sativum
Garden Cress
Leycesteria formosa
Himalayan Honeysuckle
Leymus arenarius
Lyme-grass
Lilium hansonii
Limbarda crithmoides
Golden-samphire
Limonium binervosum agg.
Rock Sea-lavender (Newborough)
Limosella aquatica
Mudwort
Limosella australis
Welsh Mudwort
Linaria purpurea
Purple Toadflax
Linaria repens
Pale Toadflax
Linum catharticum
Fairy Flax