Hypopitys monotropa
Yellow Bird's-nest
Hyptis capitata
False Ironwort
Illecebrum verticillatum
Coral-necklace
Impatiens balsamina
Garden Balsam
Impatiens noli-tangere
Touch-me-not Balsam
Impatiens parviflora
Small Balsam
Impatiens walleriana
Busy Lizzie
Imperata cylindrica
Cogon Grass
Indigofera hirsuta
Hairy Indigo
Indigofera suffruticosa
Guatemalan Indigo
Inonotus hispidus
Shaggy Bracket
Inula helenium
Elecampane
Ipomoea aquatica
Water Spinach
Ipomoea batatas
Sweet Potato
Ipomoea carnea
Pink Morning Glory
Ipomoea hederacea
Ivy-leaved Morning Glory
Ipomoea nil
Picotee Morning Glory
Ipomoea obscura
Obscure Morning Glory
Ipomoea tricolor
Mexican Morning Glory
Ipomoea triloba
Aiea Morning Glory
Isoetes lacustris
Quillwort
Ixora chinensis
Chinese Ixora
Jaapiella veronicae
Jasione montana
Sheep's-bit
Jatropha gossypiifolia
Bellyache Bush
Jatropha integerrima
Jatropha podagrica
Gout-plant
Juncus bulbosus
Bulbous Rush
Juncus compressus
Round-fruited Rush
Juncus effusus
Soft-rush
Juncus Tenuis
Slender Rush
Juniperus chinensis
Chinese Juniper
Justicia brandegeeana
Shrimp Plant
Justicia croceochlamys
Water-willow
Justicia fulvicoma
Mexican Plume
Kalanchoe crenata
Mother of Millions
Kleinhovia hospita
Guest Tree
Knautia arvensis
Field Scabious
Laburnum anagyroides
Laburnum
Lactuca saligna
Least Lettuce
Lagarosiphon major
Curly Waterweed
Lagerstroemia speciosa
Giant Crepe-myrtle
Lamium amplexicaule
Henbit Dead-nettle
Lantana camara
Common Lantana
Lantana canescens
Lantana montevidensis
Trailing Lantana
Laportea interuppta
Hen's Nettle
Larix decidua
European Larch
Lathraea clandestina
Purple Toothwort
Lathraea squamaria
Toothwort
Lathyrus linifolius
Bitter-vetch
Lathyrus nissolia
Grass Vetchling
Lathyrus pratensis
Meadow Vetchling
Lathyrus sylvestris
Narrow-leaved Everlasting-pea
Ledebouria socialis
Silver Squill
Leontodon saxatilis
Lesser Hawkbit
Lepista flaccida
Tawny Funnel
Lepista nuda
Leucaena leucocephala
Lead Tree
Leucanthemum vulgare
Oxeye Daisy
Leucophyllum frutescens
Texas Sage
Leuenbergeria bleo
Rose Cactus
Leycesteria formosa
Himalayan Honeysuckle
Licuala grande
Ruffled Fan Palm
Licuala grandis
Ruffled Fan Palm
Lilium bulbiferum
Orange-lily
Lilium pyrenaicum
Pyrenean Lily
Limonium sinuatum
Wavyleaf Sea Lavender
Limosella aquatica
Mudwort
Linaria alpina