Packera paupercula - Prairie ragwort
Packera platensis - Prairie groundsel
Panicum capillare - Common witch grass
Parthenium integrifolium - Quinine
Pedicularis canadensis - Wood betony
Pedicularis lanceolata - Swamp lousewort
Penstemon digitalis - Penstemon
Penstemon grandiflorus - Large flowered penstemon
Phlox pilosa - Phlox
Phyrma leptostachya - Lopseed
Physalis longifolia - Smooth Ground cherry
Pilea pumila - Canada clearweed
Podophyllum peltatum - May apple
Polemonium reptans - St. Jacob's Ladder
Polygonam achoreum - Leathery knotweed
Polygonatum biflorum - Smooth Solomon's seal
Potentilla arguta - Tall cinquefoil
Potentilla norvegica - Rough Cinquefoil
Prenanthes alba - Lion's foot
Prunella vulagaris - Heal-All
Pycanthemum virginianum - Mountain mint
Ranunculus fascicularis - Early buttercup
Ranunculus recurvatus - Hooked buttercup
Ratibida pinnata - Yellow coneflower
Rosa carolina - Pasture rose
Rudbeckia hirta - Black eye susan
Rudbeckia triloba - Brown-eyed susan
Ruellia humilis - Hairy wild petunia