Laccaria, purple gilled Laccaria ochropurpurea Gilled Mushrooms
Ladies'-tresses, Common (see Ladies'-Tresses, Nodding/ Common Ladies' Tresses)
Ladies'-Tresses, Nodding/ Common Ladies' Tresses Spiranthes cernua Orchid
Lady's-Slipper, Pink/ Moccasin-Flower Cypripedum acaule Orchid
Lady's-Thumb/ Redleg Polygonum persicaria Buckwheat
Lamb's Quarters Chenopodium album Goosefoot
Larch, European Larix decidua Pine
Larkspur, Dwarf/ Spring Larkspur Delphinium tricorne Buttercup
Larkspur, rocket Delphinium ajacis Buttercup
Larkspur, Spring (see Larkspur, Dwarf/ Spring Larkspur)
Laurel, Great (see Rhododendron, Great/ Great Laurel)
Laurel, Mountain Kalmia latifolia Heath
Lawn mower mushroom Panaeolus foesisicii Gilled Mushrooms
Leek, Wild/ Ramps Allium tricoccum Lily
Lepiota, smooth Leucoagricarius naucina Gilled Mushrooms
Lespedeza, Silky Lespedeza cuneata Pea
Lettuce, Florida Lactuca floridana Lettuce
Lettuce, Garden Lactuca sativa Composite
Lettuce, Prickly/ Compass Plant Lactuca scariola Lettuce
Lettuce, Tall Blue Lactuca biennis Lettuce
Lettuce, Tall White/ Rattlesnake Root Prenanthes altissima Lettuce
Lettuce, Wild Lactuca canadensis Lettuce
Licorice, White Wild Galium circaezans Bedstraw (Madder)
Lilac Syringa vulgaris Olive
Lily of the valley, wild Maianthemum canadense Lily
Lily, Canada Lilium canadense Lily
Lily, Corn (see Hellbore, False/ Corn Lily/ Indian Poke)
Lily, Japanese (see Lily, rainbow (Red variety))
Lily, oriental (see Lily, rainbow (Red variety))
Lily, rainbow (Red variety) Lilium speciosum, variety rubrum Lily
Lily, rainbow (White variety) Lilium speciosum, variety album Lily
Lily, Trout/ Dogtooth Violet/ Yellow Adder's-tongue Erythronium americanum Lily
Lily, Turk's Cap Lilium superbum Lily
Lily, White Trout Erythronium albidum Lily
Lily, Wild Yellow (see Lily, Canada)
Lily-of-the-valley tree (see Sourwood)
Lily-of-the-valley, Native Convallaria montana Lily
Linden, American Tilia americana Linden
Ling chih Ganoderma lucidum Mushrooms With Pores (Polypores)
Liverwort Liverwort
Lobelia, Great/ Large Blue Lobelia Lobelia siphilitica Lobelia
Lobelia, Large Blue (see Lobelia, Great/ Large Blue Lobelia)
Lobelia, Pale-Spike Lobelia spicata Lobelia
Locust, Black Robina pseudo-acacia Pea
Locust, Honey Gleditsia triacanthos Pea
Locust, Sweet (see Locust, Honey)
Locust, Thorny (see Locust, Honey)
Loosestrife, Fringed Lysimachea ciliata Primrose
Loosestrife, Purple Lythrum salicaria Loosestrife
Loosestrife, Whorled Lysimachea quadrifolia Primrose
Loosestrife, yellow Lysimachia terrestris Primrose
Lupine, Wild Lupinus perennis Pea
Lychnis, Evening/ Evening Campion Lychnis alba Pink
Sassafras albidum
Lindera benzoin
Cladonia cristatella
Candelaria concolor
Diploschistus scruposus
Peltiagera membranceae
Ahtiana aurescens
Flavoparmelia caperata
Flavoparmlelia caperata
Parmelia sulcata
Physcia aipolia
Hypogymnia physodes
Cladonia scabriuscula
Physcia millegrana
Physcia millegrana
Parmotrema hypotropum
Cladonia conocracea
Cladonia ochrochlora
Cladonia pyxidata
Cladonia pleurota
Cladonia pleurota
Umbilicaria mammulata
Punctelia rudecta
Punctella rudecta
Porpidia albocaerulescens
Asparagus officinalis
Uvularia grandiflora
Uvularia perfoliata
Smilax herbacea
Clintonia umbellulata
Hemerocallis fulva
Hemerocallis flava
Stenanthium gramineum
Allium vineale
Allium canadense
Smilax hispida
Veratrum viride
Muscari botryoides
Medeola virginiana
Allium tricoccum
Maianthemum canadense
Lilium canadense
Lilium speciosum, variety rubrum
Lilium speciosum, variety album
Erythronium americanum
Lilium superbum
Erythronium albidum
Convallaria montana
Disporum lanuginosum
Uvularia sessilifolia
Allium cernuum
Polygonatum biflorum
Smilacena racemosa
Ornithogalum umbellatum
Trillium sessile
Trillium grandiflorum
Trillium cernuum
Trillium nivale
Trillium erectum
Yucca filamentosa
Tilia heterophylla
Tilia americana
Lobelia cardinalis
Lobelia inflata
Lobelia siphilitica
Lobelia spicata
Lythrum salicaria