Weed Herbarium – by Scientific Name
| Lobelia syphilitica | see - Lobelia siphilitica | |
| Lobelia inflata | Indian tobacco | Lobeliaceae - Bluebell Family |
| Lobelia siphilitica | great lobelia | Lobeliaceae - Bluebell Family |
| Lonicera japonica | Japanese honeysuckle | Caprifoliaceae - Honeysuckle Family |
| Lotus corniculatus | birdfoot trefoil | Fabaceae (Leguminosae) - Pea or Bean Family |
| Lychnis flos-cuculi | ragged robin | Caryophyllaceae - Pink Family |
| Lycopus americanus | american bugleweed | Lamiaceae (Labiatae) - Mint Family |
| Lysimachia ciliata | fringed loosestrife | Primulaceae - Primrose Family |
| Lysimachia nummularia | moneywort | Primulaceae - Primrose Family |
| Lythrum salicaria | purple loosestrife | Lythraceae - Loosestrife Family |
| Maianthemum canadense | false lily-of-the-valley | Liliaceae - Lily Family |
| Malva neglecta | common mallow | Malvaceae - Mallow Family |
| Marchantia polymorpha | liverwort | Phylum: Hepatophyta |
| Matricaria matricariodes | pineappleweed | Asteraceae (Compositae) - Aster or Sunflower Family |
| Medicago lupulina | black medic | Fabaceae (Leguminosae) - Pea or Bean Family |
| Melilotus alba | white sweet clover | Fabaceae (Leguminosae) - Pea or Bean Family |
| Melilotus officinalis | yellow sweet clover | Fabaceae (Leguminosae) - Pea or Bean Family |
| Microstegium vimineum | Japanese stiltgrass | Poaceae (Graminae) - Grass Family |
| Mimulus alatus | sharp-winged monkey-flower | Scrophulariaceae - Figwort Family |
| Mirabilis nyctaginea | wild four-o'-clock | Nyctaginaceae - Four-O'clock Family |
| Miscanthus sacchariflorus | amur silvergrass | Poaceae (Graminae) - Grass Family |
| Mollugo verticillata | carpetweed | Aizoaceae - Carpetweed Family |
| Muhlenbergia schreberi | wiregrass nimblewill | Poaceae (Graminae) - Grass Family |
| Myrrhis claytonia | see - Osmorhiza claytoni | |
| Myrrhis longistylis | see - Osmorhiza longistilis |
| Nuttallanthus canadensis | see - Linaria canadensis |
| Oclemena acuminata | whorled aster | Asteraceae (Compositae) - Aster or Sunflower Family |
| Oenothera biennis | common evening primrose | Onagraceae - Evening Primrose Family |
| Ornithogalum umbellatum | star-of-Bethlehem | Liliaceae - Lily Family |
| Osmorhiza aristata | see - Osmorhiza longistilis | |
| Osmorhiza brevistylis | see - Osmorhiza claytoni | |
| Osmorhiza claytoni | sweet cicely | Apiaceae (Umbelliferae) - Carrot Family |
| Osmorhiza longistilis | aniseroot | Apiaceae (Umbelliferae) - Carrot Family |
| Oxalis stricta | yellow woodsorrel | Oxalidaceae - Woodsorrel Family |
| Oxalis corniculata | creeping woodsorrel | Oxalidaceae - Woodsorrel Family |
| Panicum capillare | witchgrass | Poaceae (Graminae) - Grass Family |
| Panicum dichotomiflorum | fall panicum | Poaceae (Graminae) - Grass Family |
| Panicum virgatum | switchgrass | Poaceae (Graminae) - Grass Family |
| Parthenocissus quinquefolia | Virginia creeper | Vitaceae - Grape Family |
| Paspalum dilatatum | dallis grass | Poaceae (Graminae) - Grass Family |
| Paspalum setaceum | paspalum | Poaceae (Graminae) - Grass Family |
| Pastinaca sativa | wild parsnip | Apiaceae (Umbelliferae) - Carrot Family |
| Persicaria arifolia | see - Polygonum arifolium | |
| Persicaria maculosa | see - Polygonum persicaria | |
| Persicaria pensylvanica | see - Polygonum pensylvanicum | |
| Persicaria sagittata | see - Polygonum sagittatum | |
| Persicaria virginica | see - Tovara virginiana |
| Petasites hybridus | butterburdock | Asteraceae (Compositae) - Aster or Sunflower Family |
| Phalaris arundinacea | reed canary grass | Poaceae (Graminae) - Grass Family |
| Phleum pratense | timothy | Poaceae (Graminae) - Grass Family |