| Family |
Taxon |
Common Name | Photographs |
| Poaceae |
Patis racemosa (Sm.) Romasch., P.M.Peterson & R.J.Soreng |
black-seeded rice grass |
|
| Pteridaceae |
Pellaea glabella Mett. ex Kuhn subsp. glabella |
dwarf cliff brake, smooth cliff brake |
|
| Scrophulariaceae |
Penstemon digitalis Nutt. ex Sims |
false foxglove, foxglove beard-tongue, tall beard-tongue, tall white beard-tongue |
|
| Saxifragaceae |
Penthorum sedoides L. |
ditch stonecrop |
|
| Polygonaceae |
Persicaria amphibia (L.) S.F.Gray |
water heart's-ease, water smartweed |
|
| Polygonaceae |
Persicaria hydropiper (L.) Spach |
marsh-pepper knotweed, water-pepper |
|
| Polygonaceae |
Persicaria maculosa Gray |
heart's-ease, spotted lady's-thumb |
|
| Polygonaceae |
Persicaria pensylvanica (L.) M.Gómez |
Pennsylvania knotweed, Pennsylvania smartweed, pinkweed |
|
| Polygonaceae |
Persicaria punctata (Elliott) Small |
dotted smartweed |
|
| Poaceae |
Phleum pratense L. subsp. pratense |
common timothy, timothy |
|
| Polemoniaceae |
Phlox divaricata L. subsp. laphamii (A.W.Wood) Wherry |
blue phlox, forest phlox, wild blue phlox, wild sweet-William, woodland phlox |
|
| Polemoniaceae |
Phlox pilosa L. |
downy phlox, prairie phlox |
|
| Polemoniaceae |
Phlox pilosa L. subsp. fulgida (Wherry) Wherry |
downy phlox, prairie phlox |
|
| Polemoniaceae |
Phlox pilosa L. subsp. pilosa |
downy phlox, prairie phlox |
|
| Verbenaceae |
Phryma leptostachya L. |
American lop-seed |
|
| Solanaceae |
Physalis heterophylla Nees var. heterophylla |
clammy ground-cherry |
|
| Solanaceae |
Physalis longifolia Nutt. |
long-leaved ground-cherry, smooth long-leaved ground-cherry, tall ground-cherry |
|
| Solanaceae |
Physalis longifolia Nutt. var. subglabrata (Mack. & Bush) Cronquist |
long-leaved ground-cherry, tall ground-cherry |
|
| Solanaceae |
Physalis virginiana Mill. var. virginiana |
lance-leaved ground-cherry, obedient plant, Virginia ground-cherry |
|
| Rosaceae |
Physocarpus opulifolius (L.) Maxim. |
common ninebark |
|
| Urticaceae |
Pilea pumila (L.) A.Gray |
Canadian clearweed |
|
| Pinaceae |
Pinus banksiana Lamb. |
jack pine |
|
| Pinaceae |
Pinus resinosa Aiton |
Canadian pine, Norway pine, red pine |
|
| Pinaceae |
Pinus strobus L. |
eastern white pine |
|
| Plantaginaceae |
Plantago lanceolata L. |
English plantain, narrow-leaved plantain, plantain, ribgrass |
|
| Plantaginaceae |
Plantago major L. |
broad-leaved plantain, common plantain, plantain |
|
| Plantaginaceae |
Plantago virginica L. |
dwarf plantain, pale-seed plantain, Virginia plantain |
|
| Poaceae |
Poa sylvestris A.Gray |
forest bluegrass, woodland bluegrass |
|
| Berberidaceae |
Podophyllum peltatum L. |
May-apple, wild mandrake |
|
| Polemoniaceae |
Polemonium reptans L. var. reptans |
Greek-valerian, spreading Jacob's-ladder |
|
| Polygalaceae |
Polygala senega L. |
Seneca snakeroot, senega root |
|
| Liliaceae |
Polygonatum biflorum (Walter) Elliott |
giant Solomon's-seal, king Solomon's-seal, smooth Solomon's-seal, Solomon's-seal |
|
| Polygonaceae |
Polygonum aviculare L. |
common knotweed, prostrate knotweed |
|
| Polypodiaceae |
Polypodium virginianum L. |
common polypody, rock-cap fern, rock polypody |
|
| Salicaceae |
Populus alba L. |
silver poplar, white poplar |
|
| Salicaceae |
Populus balsamifera L. subsp. balsamifera |
balsam poplar, hackmatack |
|
| Salicaceae |
Populus deltoides Bartram ex Marshall subsp. monilifera (Aiton) Eckenw. |
plains cottonwood |
|
| Salicaceae |
Populus grandidentata Michx. |
big-tooth aspen, large-toothed aspen |
|
| Salicaceae |
Populus tremuloides Michx. |
aspen, quaking aspen |
|
| Potamogetonaceae |
Potamogeton pusillus L. |
slender pondweed, small pondweed |
|
| Potamogetonaceae |
Potamogeton pusillus L. subsp. tenuissimus (Mert. & W.D.J.Koch) R.R.Haynes & Hellq. |
narrow-leaved small pondweed, slender pondweed, small pondweed |
|
| Rosaceae |
Potentilla argentea L. |
silvery cinquefoil, silvery five-fingers |
|
| Rosaceae |
Potentilla arguta Pursh subsp. arguta |
prairie cinquefoil, tall cinquefoil, tall potentilla |
|
| Rosaceae |
Potentilla norvegica L. |
Norwegian cinquefoil, rough cinquefoil, strawberry-weed |
|
| Rosaceae |
Potentilla recta L. |
rough-fruited cinquefoil, sulphur cinquefoil, sulphur five-fingers |
|
| Rosaceae |
Potentilla simplex Michx. |
common cinquefoil, old-field five-fingers, old-field cinquefoil |
|
| Asteraceae |
Prenanthes alba L. |
lion's-foot, rattlesnake-root, white-lettuce |
|
| Lamiaceae |
Prunella vulgaris L. |
heal-all, lawn prunella, self-heal |
|
| Lamiaceae |
Prunella vulgaris L. subsp. lanceolata (W.P.C.Barton) Hultén |
lance self-heal |
|
| Rosaceae |
Prunus americana Marshall |
American plum, wild plum |
|