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Lablab purpureus ~ Hyacinth Bean
Lactuca sativa var. Red Sails ~ Lettuce, Leaf Type
Lactuca sativa var. New Red Fire ~ Lettuce, Leaf Type
Lagenaria siceraria ~ Dipper Gourd
Lagerstroemia indica ~ Crape Myrtle
Lavatera cachemriana or L. arborea ~ Tree Mallow
Leonotis leonorus ~ Lion's Ear, Lion's Paw or Lion's Claw
Leucanthemum superbum or Chysanthemum superbum var. Silver Princess ~ Shasta Daisy
Leucanthemum nipponicum or Chrysanthemum nipponicum ~ Montauk Daisy, Nippon Daisy or Crazy Daisy
Linanthus androsaceus or Leptosiphon andosaceus var. French Hybrids ~ Linanthus
Linum flavum ~ Yellow Flax or Golden Flax
Linum narbonense ~ Blue Flax or Narbonne Flax
Linum perenne lewissi ~ Blue Flax
Lobelia erinus compacta var. Crystal Palace ~ Dwarf Lobelia
Lobelia siphilitica ~ Great Blue Lobelia
Lobularia maritima ~ Sweet Alyssum
Lophospermum scandens or Asarina scandens ~ Chicakbiddy, Twining Snapdragon, Climbing Snapdragon, Scandens
Lunaria annua ~ Lunaria, Silver Dollar or Money Plant
Lunaria annua ~ Lunaria, Silver Dollar or Money Plant
Lupinus hartwegii ~ Hartweg's Bluebonnet or Hartweg's Lupine
Lupinus nootkatensis ~ Nootka Lupine
Lupinus sp. ~ Lupine or Bluebonnet
Lychnis alba ~ White Campion
Lychnis alpina ~ Alpine Campion
Lychnis chalcedonica ~ Jerusalem Cross or Maltese Cross
Lychnis coronaria ~ Rose Campion
Lychnis coronaria ~ Rose Campion
Lythrum salicaria ~ Purple Loosestrife