Lepidium ruderale
Narrow-leaved Pepperwort
Leptospermum scoparium
Broom Tea-tree
Leycesteria formosa
Himalayan Honeysuckle
Leymus arenarius
Lyme-grass
Ligustrum vulgare
Wild Privet
Lilium pyrenaicum
Pyrenean Lily
Limonium binervosum agg.
Rock Sea-lavender (Tywyn Trewan)
Linaria repens
Pale Toadflax
Linaria supina
Prostrate Toadflax
Linaria vulgaris
Common Toadflax
Linum catharticum
Fairy Flax
Linum usitatissimum
Liparis loeselii
Fen Orchid
Lithodora diffusa
Purple Gromwell 'Heavenly Blue'
Lithospermum officinale
Common Gromwell
Littorella uniflora
Shoreweed
Lobelia dortmanna
Water Lobelia
Logfia minima
Small Cudweed
Lolium perenne
Perennial Rye-grass
Lonicera periclymenum
Honeysuckle
Lonicera xylosteum
Fly Honeysuckle
Lotus corniculatus
Common Bird's-foot-trefoil
Ludwigia palustris
Hampshire-purslane
Lunaria annua
Honesty