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
Linum usitatissimum
Flax
Liparis loeselii
Fen Orchid
Liriodendron tulipifera
Tulip-tree
Lithospermum officinale
Common Gromwell
Littorella uniflora
Shoreweed
Livistona chinensis
Chinese Fan Palm
Lobelia nummularia
Common Pratia
Lobelia urens
Heath Lobelia