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
Leptospermum scoparium
Broom Tea-tree
Leucadendron salignum
Common#Sunshine Conebush
Leucanthemum vulgare
Oxeye Daisy
Leucojum aestivum
Summer Snowflake
Leucojum vernum
Spring Snowflake
Leycesteria formosa
Himalayan Honeysuckle
Leymus arenarius
Lyme-grass
Licuala grandis
Ruffled Fan Palm
Licuala peltata
Fan Palm
Ligustrum vulgare
Wild Privet
Lilium bulbiferum
Orange-lily
Lilium hansonii
Lilium pyrenaicum
Pyrenean Lily
Limbarda crithmoides
Golden-samphire
Limonium binervosum agg.
Rock Sea-lavender (Newborough)
Limonium vulgare
Common Sea-lavender
Limosella aquatica
Mudwort
Limosella australis
Welsh Mudwort
Linaria alpina
Alpine Toadflax
Linaria arenaria
Sand Toadflax
Linaria purpurea
Purple Toadflax
Linaria repens
Pale Toadflax
Linaria supina
Prostrate Toadflax
Linaria vulgaris
Common Toadflax
Linaria x dominii
Linum catharticum
Fairy Flax
Linum usitatissimum
Liparis loeselii
Fen Orchid
Liriodendron tulipifera
Tulip-tree
Lithodora diffusa
Purple Gromwell 'Heavenly Blue'
Lithospermum officinale
Common Gromwell
Littorella uniflora
Shoreweed
Livistona chinensis
Chinese Fan Palm
Lobaria pulmonaria
Oak Lungwort
Lobelia dortmanna
Water Lobelia
Lobelia nummularia
Common Pratia
Lobelia urens
Heath Lobelia
Lobularia maritima
Sweet Alison
Logfia minima
Small Cudweed
Lonicera periclymenum
Honeysuckle
Lonicera xylosteum
Fly Honeysuckle
Lotus corniculatus
Common Bird's-foot-trefoil
Lotus pedunculatus
Greater Bird's-foot-trefoil
Lotus subbiflorus
Hairy Bird's-foot-trefoil
Lotus tenuis
Narrow-leaved Bird's-foot-trefoil
Ludwigia palustris
Hampshire-purslane
Luma apiculata
Chilean Myrtle
Lumnitzera racemosa
White-flowered Black Mangrove
Lunaria annua
Honesty
Luronium natans
Floating Water-plantain
Luzula campestris
Field Wood-rush
Luzula nivea
Snow-white Wood-rush
Luzula pilosa
Hairy Wood-rush
Luzula sylvatica
Great Wood-rush
Lycopodium clavatum
Stag's-horn Clubmoss
Lycopsis arvensis
Bugloss
Lycopus europaeus
Gypsywort
Lygodium japonicum
Vine-like Fern
Lysichiton americanus
American Skunk-cabbage
Lysimachia arvensis
Scarlet Pimpernel