Click on a common name for a photo of the plant, or click on a letter for names beginning with that letter.
| Magnolia, Chinese |
Magnolia ×soulangiana |
| Magnolia, Kobus |
Magnolia kobus |
| Magnolia, Northern Sweetbay |
Magnolia virginiana var. virginiana |
| Mahonia, Leatherleaf |
Mahonia bealei |
| Maidenhair-fern |
Adiantum pedatum |
| Mallow, Common |
Malva neglecta |
| Mallow, Prickly |
Sida spinosa |
| Mallow, Sea-shore |
Kosteletzkya pentacarpos var. pentacarpos |
| Maple, Black |
Acer nigrum |
| Maple, Japanese |
Acer palmatum |
| Maple, Norway |
Acer platanoides |
| Maple, Red |
Acer rubrum var. trilobum |
| Maple, Red |
Acer rubrum var. rubrum |
| Maple, Silver |
Acer saccharinum |
| Marigold, Marsh |
Caltha palustris |
| Mayapple |
Podophyllum peltatum |
| Mayflower, Canada |
Maianthemum canadense |
| Mayweed |
Anthemis cotula |
| Mazus, Japanese |
Mazus pumilus |
| Meadow-parsnip, Hairy-jointed |
Thaspium barbinode |
| Meadowbeauty, Maryland |
Rhexia mariana var. mariana |
| Meadowbeauty, Virginia |
Rhexia virginica |
| Meadowrue, Tall |
Thalictrum pubescens |
| Medic, Black |
Medicago lupulina |
| Mermaidweed, False |
Floerkea proserpinacoides |
| Mile-a-minute |
Persicaria perfoliata |
| Milkweed, Butterfly |
Asclepias tuberosa var. tuberosa |
| Milkweed, Common |
Asclepias syriaca |
| Milkweed, Green |
Asclepias viridiflora |
| Milkweed, Poke |
Asclepias exaltata |
| Milkweed, Purple |
Asclepias purpurascens |
| Milkweed, Swamp |
Asclepias incarnata subsp. pulchra |
| Milkweed, Whorled |
Asclepias verticillata |
| Milkwort, Field |
Polygala sanguinea |
| Milkwort, Gay-wing |
Triclisperma paucifolia |
| Milkwort, Whorled |
Polygala verticillata var. isocycla |
| Mimosa |
Albizia julibrissin |
| Mimosa, Silk Tree |
Albizia julibrissin |
| Mint, Field |
Mentha arvensis |
| Mistletoe, American |
Phoradendron serotinum subsp. serotinum |
| Mock-cucumber, Wild |
Echinocystis lobata |
| Monkeyflower, Allegheny |
Mimulus ringens |
| Monkeyflower, Square-stem |
Mimulus ringens |
| Moonseed, Canada |
Menispermum canadense |
| Morning-glory, Big-root |
Ipomoea pandurata |
| Morning-glory, Ivy-leaf |
Ipomoea hederacea |
| Morning-glory, Ivy-leaved |
Ipomoea hederacea |
| Morning-glory, Whitestar |
Ipomoea lacunosa |
| Mosquito-fern, Eastern |
Azolla caroliniana |
| Moss, Baby Tooth |
Plagiomnium cuspidatum |
| Moss, Bald Bristle |
Orthotrichum stellatum |
| Moss, Common Tree-Skirt |
Anomodon attenuatus |
| Moss, Cord Glaze |
Entodon seductrix |
| Moss, Delicate Fern |
Thuidium delicatulum |
| Moss, Fountain Feather |
Hygroamblystegium tenax |
| Moss, Foxtail |
Brachythecium acuminatum |
| Moss, Necklace Chain |
Leskea gracilescens |
| Moss, Ohio Bristle |
Orthotrichum ohioense |
| Moss, Poodle |
Anomodon attenuatus |
| Moss, Red Penny |
Rhizomnium punctatum |
| Moss, Tangled Thread |
Amblystegium varium |
| Moss, White |
Leucobryum albidum |
| Moss, Windswept Broom |
Dicranum scoparium |
| Mother-wort, Horehound |
Chaiturus marrubiastrum |
| Mountain-mint, Slender |
Pycnanthemum tenuifolium |
| Mountain-mint, Virginia |
Pycnanthemum virginianum |
| Mud-plantain, Kidneyleaf |
Heteranthera reniformis |
| Mulberry, Red |
Morus rubra |
| Mulberry, White |
Morus alba |
| Mullein, Clasping-leaf |
Verbascum phlomoides |
| Mullein, Great |
Verbascum thapsus |
| Mullein, Moth |
Verbascum blattaria |
| Mustard, Garlic |
Alliaria petiolata |
| Myrtle, Sea |
Baccharis halimifolia |