| Family |
Taxon |
Common Name | Photographs |
| Fabaceae |
Medicago sativa L. |
alfalfa |
|
| Scrophulariaceae |
Melampyrum lineare Desr. |
narrow-leaved cow-wheat |
|
| Fabaceae |
Melilotus albus Medik. |
white sweet-clover |
|
| Fabaceae |
Melilotus officinalis (L.) Lam. |
yellow sweet-clover |
|
| Lamiaceae |
Mentha arvensis L. var. canadensis (L.) Kuntze |
field mint, wild mint |
|
| Scrophulariaceae |
Mimulus ringens L. var. ringens |
Allegheny monkey-flower, monkey-flower |
|
| Rubiaceae |
Mitchella repens L. |
partridgeberry |
|
| Saxifragaceae |
Mitella diphylla L. |
bishop's-cap, two-leaf miterwort |
|
| Saxifragaceae |
Mitella nuda L. |
naked miterwort, small bishop's-cap |
|
| Molluginaceae |
Mollugo verticillata L. |
carpetweed, green carpetweed, Indian chickweed |
|
| Lamiaceae |
Monarda fistulosa L. subsp. fistulosa |
bee balm, wild bergamot |
|
| Monotropaceae |
Monotropa hypopithys L. |
false beech-drops, pinesap |
|
| Monotropaceae |
Monotropa uniflora L. |
Indian-pipe |
|
| Poaceae |
Muhlenbergia mexicana (L.) Trin. |
leafy satin grass, Mexican muhly, wire-stem muhly |
|
| Boraginaceae |
Myosotis scorpioides L. |
common forget-me-not, forget-me-not, true forget-me-not, water scorpion-grass |
|
| Caryophyllaceae |
Myosoton aquaticum (L.) Moench |
giant chickweed, water chickweed |
|
| Haloragaceae |
Myriophyllum sibiricum Kom. |
common water-milfoil, short-spike water-milfoil |
|
| Najadaceae |
Najas flexilis (Willd.) Rostk. & W.L.E.Schmidt |
nodding water-nymph, northern water-nymph, slender naiad |
|
| Brassicaceae |
Nasturtium officinale R.Br. |
watercress |
|
| Nymphaeaceae |
Nuphar variegata Durand |
bull-head pond-lily |
|
| Nymphaeaceae |
Nymphaea odorata Aiton |
American white water-lily, fragrant water-lily |
|
| Scrophulariaceae |
Odontites verna (Bellardi) Dumort. subsp. serotina (Dumort.) Corb. |
odontites, red bartsia |
|
| Onagraceae |
Oenothera biennis L. |
bastard evening-primrose, common evening-primrose |
|
| Onagraceae |
Oenothera oakesiana (A.Gray) J.W.Robbins ex S.Watson & Coult. |
Oakes' evening-primrose |
|
| Onagraceae |
Oenothera parviflora L. |
northern evening-primrose, small-flowered evening-primrose |
|
| Onagraceae |
Oenothera perennis L. |
small evening-primrose, small sundrops |
|
| Onagraceae |
Oenothera pilosella Raf. subsp. pilosella |
meadow evening-primrose, meadow sundrops, prairie sundrops |
|
| Onagraceae |
Oenothera villosa Thunb. |
hairy evening-primrose |
|
| Onagraceae |
Oenothera villosa Thunb. subsp. villosa |
hairy evening-primrose |
|
| Dryopteridaceae |
Onoclea sensibilis L. |
sensitive fern |
|
| Poaceae |
Oryzopsis asperifolia Michx. |
rough-leaved rice grass |
|
| Apiaceae |
Osmorhiza claytonii (Michx.) C.B.Clarke |
bland sweet cicely, Clayton's sweet-root, hairy sweet cicely |
|
| Osmundaceae |
Osmunda cinnamomea L. |
cinnamon fern |
|
| Osmundaceae |
Osmunda claytoniana L. |
interrupted fern |
|
| Osmundaceae |
Osmunda regalis L. var. spectabilis (Willd.) A.Gray |
American royal fern, flowering fern, royal fern |
|
| Oxalidaceae |
Oxalis stricta L. |
common yellow oxalis, tall wood-sorrel |
|
| Asteraceae |
Packera aurea (L.) A.Löve & D.Löve |
golden ragwort, heart-leaved groundsel |
|
| Araliaceae |
Panax trifolius L. |
dwarf ginseng, groundnut |
|
| Poaceae |
Panicum capillare L. subsp. capillare |
common witch grass, old-witch grass, witch grass |
|
| Poaceae |
Panicum virgatum L. |
switch grass |
|
| Vitaceae |
Parthenocissus vitacea (Knerr) Hitchc. |
grape woodbine |
|
| Scrophulariaceae |
Pedicularis lanceolata Michx. |
fen betony, swamp betony, swamp-lousewort |
|
| Scrophulariaceae |
Penstemon digitalis Nutt. ex Sims |
false foxglove, foxglove beard-tongue, tall beard-tongue, tall white beard-tongue |
|
| Scrophulariaceae |
Penstemon pallidus Small |
eastern white beard-tongue, pale beard-tongue |
|
| Saxifragaceae |
Penthorum sedoides L. |
ditch stonecrop |
|
| Polygonaceae |
Persicaria amphibia (L.) S.F.Gray |
water heart's-ease, water smartweed |
|
| Polygonaceae |
Persicaria arifolia (L.) Haraldson |
halberd-leaved tear-thumb |
|
| Polygonaceae |
Persicaria hydropiper (L.) Spach |
marsh-pepper knotweed, water-pepper |
|
| Polygonaceae |
Persicaria lapathifolia (L.) S.F.Gray |
curly-top knotweed, dock-leaved smartweed, heart's-ease |
|
| Polygonaceae |
Persicaria maculosa Gray |
heart's-ease, spotted lady's-thumb |
|