Hordeum vulgare
Six-rowed Barley
Hornungia petraea
Hutchinsia
Iberis amara
Wild Candytuft
Iberis umbellata
Garden Candytuft
Illecebrum verticillatum
Coral-necklace
Impatiens glandulifera
Indian Balsam
Impatiens noli-tangere
Touch-me-not Balsam
Impatiens parviflora
Small Balsam
Isolepis setacea
Bristle Club-rush
Juncus bufonius
Toad Rush
Kickxia elatine
Sharp-leaved Fluellen
Lactuca saligna
Least Lettuce
Lactuca serriola
Prickly Lettuce
Lamium amplexicaule
Henbit Dead-nettle
Lamium hybridum
Cut-leaved Dead-nettle
Lamium purpureum
Red Dead-nettle
Lapsana communis
Nipplewort
Lathyrus aphaca
Yellow Vetchling
Lathyrus nissolia
Grass Vetchling
Lathyrus oleraceus
Garden Pea
Lepidium didymum
Lesser Swine-cress
Lepidium ruderale
Narrow-leaved Pepperwort
Limosella aquatica
Mudwort
Limosella australis
Welsh Mudwort