UMass Extension Weed Herbarium
| Common Name | Scientific Name | Family Name | |
|---|---|---|---|
| madder, wild | see - bedstraw, smooth | ||
| maiden, pink | Dianthus deltoides | Caryophyllaceae - Pink Family | |
| mallow, common | Malva neglecta | Malvaceae - Mallow Family | |
| mallow, Indian | see - velvetleaf | ||
| mallow, low | see - mallow, common | ||
| mallow, round-leaved | see - mallow, common | ||
| mallow, Venice | Hibicus tronium | Malvaceae - Mallow Family | |
| marestail | see - horseweed | ||
| markweed | see - poison ivy | ||
| Mary's grass | see - stiltgrass, Japanese | ||
| masterwort | see - angelica, purplestem | ||
| matgrass | see - knotweed, prostrate | ||
| mayflower, Canada | see - lily-of-the-valley, false | ||
| mayweed | see - pineappleweed | ||
| meadow rue, tall | Thalictrum polygamum | Ranunculaceae - Buttercup Family | |
| mealweed | see - lambsquarters, common | ||
| medic, black | Medicago lupulina | Fabaceae (Leguminosae) - Pea or Bean Family | |
| melilot | see - copper-leaf, rhombic | ||
| mercuryweed | see - mallow, common | ||
| Mexicantea, wormseed | Chenopodium ambrosioides | Chenopodiaceae - Goosefoot Family | |
| milfoil | see - yarrow | ||
| milkmaid | see - bittercress, cuckoo | ||
| milkweed, climbing | see - swallowwort, black | ||
| milkweed, climbing | see - swallowwort, pale | ||
| milkweed, common | Asclepias syriaca | Asclepiadaceae - Milkweed Family | |
| milkweed, swamp | Asclepias incarnata | Asclepiadaceae - Milkweed Family | |
| millet, wild | see - foxtail, yellow | ||
| mock-cypress | see - kochia | ||
| moneywort | Lysimachia nummularia | Primulaceae - Primrose Family | |
| monkey-flower, sharp-winged | Mimulus alatus | Scrophulariaceae - Figwort Family | |
| morningglory, wild | see - bindweed, field | ||
| morningglory, wild | see - bindweed, hedge | ||
| motherwort | Leonurus cardiaca | Lamiaceae (Labiatae) - Mint Family | |
| mugwort | Artemisia vulgaris | Asteraceae (Compositae) - Aster or Sunflower Family | |
| mullein, common | Verbascum thapsus | Scrophulariaceae - Figwort Family | |
| mustard, field | see - mustard, wild | ||
| mustard, garlic | Alliaria petiolata | Brassicaceae (Cruciferae) - Mustard Family | |
| mustard, hedge | Sisymbrium officinale | Brassicaceae (Cruciferae) - Mustard Family | |
| mustard, tower | Arabis glabra | Brassicaceae (Cruciferae) - Mustard Family | |
| mustard, treacle | see - mustard, wallflower | ||
| mustard, wallflower | Erysimum cheiranthoides | Brassicaceae (Cruciferae) - Mustard Family | |
| mustard, wild | Brassica kaber | Brassicaceae (Cruciferae) - Mustard Family | |
| mustard, worm-seed | see - mustard, wallflower |