Holcus lanatus
Yorkshire-fog
Homalomena rubescens
Shield Plant
Hordeum distichon
Two-rowed Barley
Hordeum murinum
Wall Barley
Hordeum secalinum
Meadow Barley
Hordeum vulgare
Six-rowed Barley
Hyacinthoides hispanica
Spanish Bluebell
Hyacinthoides italica
Italian Bluebell
Hyacinthoides non-scripta
Bluebell
Hyacinthoides x massartiana
Garden Bluebell
Hydrocharis morsus-ranae
Frogbit
Hymenocallis fragrans
Spider Lily
Hyophorbe lagenicaulis
Bottle Palm
Imperata
Imperata cylindrica
Cogon Grass
Iris
Iris
Iris douglasiana
Iris (douglasiana)
Iris foetidissima
Stinking Iris
Iris pseudacorus
Yellow Iris
Iris sibirica
Siberian Iris
Iris unguicularis
Algerian Iris
Isolepis setacea
Bristle Club-rush
Juncus acutiflorus
Sharp-flowered Rush
Juncus acutus
Sharp Rush
Juncus articulatus
Jointed Rush
Juncus bufonius
Toad Rush
Juncus bulbosus
Bulbous Rush
Juncus compressus
Round-fruited Rush
Juncus effusus
Soft-rush
Juncus gerardii
Saltmarsh Rush
Juncus inflexus
Hard Rush
Juncus squarrosus
Heath Rush
Juncus subnodulosus
Blunt-flowered Rush
Juncus tenuis
Slender Rush
Lagarosiphon major
Curly Waterweed
Lagurus ovatus
Hare's-tail
Ledebouria socialis
Silver Squill
Lemna gibba
Fat Duckweed
Lemna minor
Common Duckweed
Lemna minuta
Least Duckweed
Lemna trisulca
Ivy-leaved Duckweed
Lemna turionifera
Turion Duckweed
Lemna valdiviana
Leucojum aestivum
Summer Snowflake
Leucojum vernum
Spring Snowflake
Leymus arenarius
Lyme-grass
Licuala grandis
Ruffled Fan Palm
Licuala peltata
Fan Palm
Lilium bulbiferum
Orange-lily
Lilium candidum
Madonna Lily
Lilium davidii
Pere#David's Lily
Lilium formosanum
Formosan Lily
Lilium hansonii
Hanson's Lily
Lilium henryi
Henry's Lily
Lilium hybrid
Lily (orange)
Lilium martagon
Martagon Lily
Lilium pyrenaicum
Pyrenean Lily
Lilium regale
Royal Lily
Liparis loeselii
Fen Orchid
Livistona chinensis
Chinese Fan Palm
Lolium perenne
Perennial Rye-grass
Luronium natans
Floating Water-plantain
Luzula campestris
Field Wood-rush
Luzula multiflora
Heath Wood-rush
Luzula nivea
Snow-white Wood-rush
Luzula pilosa
Hairy Wood-rush
Luzula sylvatica
Great Wood-rush
Lysichiton americanus
American Skunk-cabbage
Maianthemum racemosum
Treacleberry
Maranta arundinaceae
Arrowroot