Click on a common name for a photo of the plant, or click on a letter for names beginning with that letter.
| Ladies'-tresses, Nodding |
Spiranthes cernua |
| Ladies'-tresses, Southern Slender |
Spiranthes lacera var. gracilis |
| Ladies'-tresses, Twisted |
Spiranthes vernalis |
| Lady's-slipper, Large Yellow |
Cypripedium parviflorum var. pubescens |
| Lady's-slipper, Pink |
Cypripedium acaule |
| Laurel, Mountain |
Kalmia latifolia |
| Leafcup, Yellow-flowered |
Smallanthus uvedalius |
| Leatherwood, Eastern |
Dirca palustris |
| Lettuce, Canada |
Lactuca canadensis |
| Lettuce, Prickly |
Lactuca serriola |
| Lettuce, Tall Blue |
Lactuca biennis |
| Lettuce, Woodland |
Lactuca floridana |
| Lily, Canada |
Lilium canadense subsp. canadense |
| Lily, Turk's Cap |
Lilium superbum |
| Lily, Wood |
Lilium philadelphicum var. philadelphicum |
| Lion's tail |
Chaiturus marrubiastrum |
| Liverwort, Scented |
Conocephalum conicum |
| Lizard's-tail |
Saururus cernuus |
| Lobelia, Downy |
Lobelia puberula var. puberula |
| Lobelia, Great Blue |
Lobelia siphilitica |
| Lobelia, Inflated |
Lobelia inflata |
| Locust, Black |
Robinia pseudoacacia |
| Locust, Bristly |
Robinia hispida var. hispida |
| Loosestrife, Creeping |
Lysimachia nummularia |
| Loosestrife, Fringed |
Lysimachia ciliata |
| Loosestrife, Purple |
Lythrum salicaria |
| Loosestrife, Swamp |
Lysimachia terrestris |
| Loosestrife, Swamp |
Decodon verticillatus |
| Loosestrife, Whorled |
Lysimachia quadrifolia |
| Lopseed |
Phryma leptostachya var. leptostachya |
| Lotus, American |
Nelumbo lutea |
| Lupine, Purple |
Lupinus perennis |