Lepidium latifolium
Dittander
Lepidium ruderale
Narrow-leaved Pepperwort
Leptospermum scoparium
Broom Tea-tree
Leucanthemum vulgare
Oxeye Daisy
Leucojum aestivum
Summer Snowflake
Leycesteria formosa
Himalayan Honeysuckle
Ligustrum vulgare
Wild Privet
Lilium pyrenaicum
Pyrenean Lily
Limbarda crithmoides
Golden-samphire
Limonium binervosum agg.
Rock Sea-lavender (Newborough)
Limosella aquatica
Mudwort
Linaria repens
Pale Toadflax
Linaria supina
Prostrate Toadflax
Linaria vulgaris
Common Toadflax
Linum catharticum
Fairy Flax
Linum usitatissimum
Liparis loeselii
Fen Orchid
Liriodendron tulipifera
Tulip-tree
Littorella uniflora
Shoreweed
Lobaria pulmonaria
Oak Lungwort
Lobelia dortmanna
Water Lobelia
Lobelia urens
Heath Lobelia
Logfia minima
Small Cudweed
Lonicera periclymenum
Honeysuckle