UMass Extension Weed Herbarium
| Common Name | Scientific Name | Family Name | |
|---|---|---|---|
| lady's smock | see - bittercress, cuckoo | ||
| lambsquarters, common | Chenopodium album | Chenopodiaceae - Goosefoot Family | |
| lawngrass, Japanese | Zoysia japonica | Poaceae (Graminae) - Grass Family | |
| lawngrass, Korean | see - lawngrass, Japanese | ||
| lespedeza, Virginia | see - bush clover, slender | ||
| lettuce, biennial | Lactuca biennis | Asteraceae (Compositae) - Aster or Sunflower Family | |
| lettuce, Canada | see - lettuce, tall | ||
| lettuce, prickly | Lactuca serriola | Asteraceae (Compositae) - Aster or Sunflower Family | |
| lettuce, tall | Lactuca canadensis | Asteraceae (Compositae) - Aster or Sunflower Family | |
| lettuce , tall blue | see - lettuce, biennial | ||
| lettuce, wild | see - lettuce, tall | ||
| lily-of-the-valley, false | Maianthemum canadense | Liliaceae - Lily Family | |
| lion's tooth | see - dandelion | ||
| little starwort | Stellaria graminea | Caryophyllaceae - Pink Family | |
| liverwort | Marchantia polymorpha | Phylum: Hepatophyta | |
| lobelia, great | Lobelia siphilitica | Lobeliaceae - Bluebell Family | |
| locust, bristly | Robinia hispida | Fabaceae (Leguminosae) - Pea or Bean Family | |
| loosestrife, fringed | Lysimachia ciliata | Primulaceae - Primrose Family | |
| loosestrife, purple | Lythrum salicaria | Lythraceae - Loosestrife Family | |
| lovegrass, purple | Eragrotis spectabilis | Poaceae (Graminae) - Grass Family | |
| lovegrass, stinkgrass |