Justicia croceochlamys
Water-willow
Justicia fulvicoma
Mexican Plume
Kickxia elatine
Sharp-leaved Fluellen
Kleinhovia hospita
Guest Tree
Knautia arvensis
Field Scabious
Koenigia polystachya
Himalayan Knotweed
Laburnum anagyroides
Laburnum
Lactuca saligna
Least Lettuce
Lactuca serriola
Prickly Lettuce
Lactuca virosa
Great Lettuce
Lagerstroemia speciosa
Giant Crepe-myrtle
Lamiastrum galeobdolon
Yellow Archangel
Lamium amplexicaule
Henbit Dead-nettle
Lamium purpureum
Red Dead-nettle
Lantana canescens
Lathraea squamaria
Toothwort
Lathyrus japonicus
Sea Pea
Lathyrus latifolius
Broad-leaved Everlasting-pea
Lathyrus linifolius
Bitter-vetch
Lathyrus nissolia
Grass Vetchling
Lathyrus odoratus
Sweet Pea
Lathyrus oleraceus
Garden Pea
Lathyrus pratensis
Meadow Vetchling
Lathyrus sylvestris
Narrow-leaved Everlasting-pea
Lathyrus vernus
Spring Pea
Leontodon hispidus
Rough Hawkbit
Leontodon saxatilis
Lesser Hawkbit
Leonurus cardiaca
Motherwort
Lepidium draba
Hoary Cress
Lepidium heterophyllum
Smith's Pepperwort
Lepidium latifolium
Dittander
Lepidium ruderale
Narrow-leaved Pepperwort
Leptospermum scoparium
Broom Tea-tree
Leycesteria formosa
Himalayan Honeysuckle
Leymus arenarius
Lyme-grass
Ligustrum vulgare
Wild Privet
Lilium bulbiferum
Orange-lily
Lilium pyrenaicum
Pyrenean Lily
Limonium binervosum agg.
Rock Sea-lavender (Tywyn Trewan)
Limonium sinuatum
Wavyleaf Sea Lavender
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
Lupinus polyphyllus
Garden Lupin
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
Lycopus europaeus
Gypsywort
Lysichiton americanus
American Skunk-cabbage
Lysimachia arvensis
Scarlet Pimpernel
Lysimachia punctata
Dotted Loosestrife
Lysimachia vulgaris
Yellow Loosestrife
Lythrum salicaria
Purple-loosestrife
Macroptilium lathyroides
Phasey Bean