| Oxytropis splendens |
Showy Locoweed |
| Pachysandra terminalis |
Japanese Pachysandra |
| Packera aurea |
Golden Ragwort |
| Packera cana |
Woolly Groundsel |
| Panicum dichotomiflorum |
Fall Panic Grass |
| Panicum miliaceum |
Broomcorn Millet |
Panicum virgatum  |
Switch Grass |
| Papaver nudicaule |
Iceland Poppy |
| Parnassia palustris |
Marsh Grass-Of-Parnassus |
Parthenocissus quinquefolia  |
Virginia Creeper |
| Parthenocissus tricuspidata |
Boston Ivy |
| Pascopyrum smithii |
Western Wheatgrass |
| Pedicularis canadensis |
Wood Betony |
| Peltandra virginica |
Green Arrow Arum |
| Pennisetum glaucum |
Pearl Millet |
| Penstemon digitalis |
Smooth Penstemon |
| Penstemon ovatus |
Broad-leaved Penstemon |
| Petasites sagittatus |
Arrow-Leaved Sweet Coltsfoot |
| Phacelia campanularia |
California Bluebell |
| Phalaris arundinacea |
Reed Canary Grass |
| Phleum pratense |
Timothy |
| Phlox divaricata |
Wild Blue Phlox |
| Phlox maculata ssp maculata |
Wild Sweetwilliam |
| Phlox subulata |
Moss Phlox |
| Photinia melanocarpa |
Black Chokeberry |
| Phragmites australis |
Common Reed Grass |
| Physocarpus opulifolius |
Ninebark |
| Phytolacca americana |
American Pokeweed |
| Picea abies |
Norway Spruce |
| Picea glauca |
White Spruce |
| Picea mariana |
Black Spruce |
| Pinus banksiana |
Jack Pine |
| Pinus resinosa |
Red Pine |
| Pinus rigida |
Pitch Pine |
| Pinus strobus |
White Pine |
| Pinus sylvestris |
Scots Pine |
| Plantago major |
Common Plantain |
| Plantago patagonica |
Pursh's Plantain |
| Poa annua |
Annual Bluegrass |
| Poa compressa |
Canada Bluegrass |
| Poa palustris |
Fowl Bluegrass |
| Poa pratensis |
Kentucky Bluegrass |
| Poa secunda |
Sandberg Bluegrass |
| Poa sylvestris |
Woodland Bluegrass |
| Poa trivialis |
Rough Bluegrass |
| Polemonium occidentale |
Western Polemonium |
| Polygonum amphibium |
Water Knotweed |
| Polygonum hydropiper |
Marshpepper Knotweed |
| Polygonum hydropiperoides |
Swamp Smartweed |
| Polygonum persicaria |
Spotted Ladysthumb |
| Polygonum punctatum |
Dotted Smartweed |
| Polygonum sagittatum |
Arrowleaf Tearthumb |
| Polygonum viviparum |
Alpine Bistort |
| Polypogon monspeliensis |
Annual Rabbitsfoot Grass |
| Pontederia cordata |
Pickerelweed |
| Populus alba |
White Poplar |
| Populus balsamifera |
Balsam Poplar |
| Populus deltoides |
Cottonwood |
| Populus deltoides ssp monilifera |
Plains Cottonwood |
| Populus grandidentata |
Big-Toothed Aspen |
| Populus nigra |
Lombardy Poplar |
| Populus tremuloides |
Quaking Aspen |
| Potamogeton diversifolius |
Waterthread Pondweed |
| Potentilla arguta |
Prairie Cinquefoil |
| Potentilla gracilis |
Slender Cinquefoil |
| Prunella vulgaris |
Heal-All |
| Prunus americana |
Wild Plum |
| Prunus nigra |
Canadian Plum |
| Prunus pensylvanica |
Pin Cherry |
| Prunus pumila |
Sand Cherry |
| Prunus serotina |
Black Cherry |
| Psathyrostachys juncea |
Russian Wildrye |
| Pseudotsuga menziesii |
Douglas Fir |
| Ptelea trifoliata |
Common Hoptree |
| Pteridium aquilinum |
Bracken |
| Puccinellia nuttalliana |
Nuttall's Alkaligrass |
| Quercus alba |
White Oak |
| Quercus bicolor |
Swamp White Oak |
| Quercus macrocarpa |
Bur Oak |
| Quercus muehlenbergii |
Chinkapin Oak |
| Quercus rubra |
Northern Red Oak |
| Quercus velutina |
Black Oak |
| Ranunculus abortivus |
Kidney-Leaved Buttercup |
| Ranunculus cymbalaria |
Alkali Buttercup |
| Ranunculus flammula |
Greater Creeping Spearwort |
| Ranunculus hispidus |
Hispid Buttercup |
| Ranunculus longirostris |
Longbeak Buttercup |
| Ranunculus pensylvanicus |
Bristly Buttercup |
| Ranunculus repens |
Creeping Buttercup |
| Ranunculus sceleratus |
Cursed Buttercup |
| Ratibida columnifera |
Red Prairie Coneflower |
| Ratibida pinnata |
Grayheaded Coneflower |
| Rhamnus alnifolia |
Dwarf Alder |
| Rhus glabra |
Smooth Sumac |
| Rhus hirta |
Staghorn Sumac |
| Ribes americanum |
Wild Black Currant |
| Ribes aureum |
Golden Currant |
| Ribes hudsonianum |
Northern Black Currant |
| Ribes lacustre |
Prickly Currant |
| Robinia pseudoacacia |
Black Locust |
| Rorippa sessiliflora |
Sissile-Flowered Yellow Cress |
| Rorippa sinuata |
Spreading Yellowcress |
| Rorippa sylvestris |
Creeping Yellowcress |
| Rosa acicularis |
Prickly Rose |
| Rosa carolina |
Carolina Rose |
| Rosa eglanteria |
Sweetbriar Rose |
| Rosa rugosa |
Rugosa Rose |
| Rosa woodsii |
Woods' Rose |
| Rubus allegheniensis |
Allegheny Blackberry |
| Rubus alumnus |
Oldfield Blackberry |
| Rubus argutus |
UNKNOWN |
| Rubus baileyanus |
Bailey's Dewberry |
| Rubus chamaemorus |
Cloudberry |
| Rubus hispidus |
|
| Rubus idaeus ssp strigosus |
Grayleaf Red Raspberry |
| Rubus occidentalis |
Black Raspberry |
| Rubus parviflorus |
Thimbleberry |
| Rudbeckia hirta |
Black-Eyed Susan |
| Rudbeckia laciniata |
Tall Coneflower |
| Ruellia humilis |
Wild Petunia |
| Rumex maritimus |
Golden Dock |
| Sagittaria cuneata |
Arumleaf Arrowhead |
| Sagittaria latifolia |
Broad-Leaved Arrowhead |
| Salicornia rubra |
Red Swampfire |
| Salix alba |
White Willow |
| Salix amygdaloides |
Peach-Leaved Willow |
| Salix candida |
Sage-Leaved Willow |
| Salix discolor |
Pussy Willow |
| Salix eriocephala |
Missouri River Willow |
| Salix humilis |
Prairie Willow |
| Salix lucida |
Shining Willow |
| Salix lutea |
Yellow Willow |
| Salix nigra |
Black Willow |
| Salix pentandra |
Laurel Willow |
| Salix planifolia |
Diamondleaf Willow |
| Salix sericea |
Silky Willow |
| Sambucus nigra ssp canadensis |
Common Elderberry |
| Saponaria officinalis |
Bouncing Bet |
| Schizachyrium scoparium |
Little Bluestem |
| Schoenoplectus fluviatilis |
River Bulrush |
| Schoenoplectus heterochaetus |
Slender Bulrush |
| Schoenoplectus maritimus |
Cosmopolitan Bulrush |
| Schoenoplectus tabernaemontani |
Softstem Bulrush |
| Scirpus atrovirens |
Green Bulrush |
| Scirpus cyperinus |
Wool Grass |
| Scirpus georgianus |
Georgia Bulrush |
| Scirpus microcarpus |
Panicled Bulrush |
| Scirpus pallidus |
Cloaked Bulrush |
| Scirpus pedicellatus |
Woolgrass |
| Scirpus pendulus |
Rufous Bulrush |
| Scolochloa festucacea |
Common Rivergrass |
| Secale cereale |
Cereal Rye |
| Senecio integerrimus |
Lambstongue Ragwort |
| Senecio vulgaris |
Old Man In-the-Spring |
| Setaria italica |
Foxtain |
| Shepherdia argentea |
Silver Buffaloberry |
| Shepherdia canadensis |
Russet Buffaloberry |
| Sisyrinchium angustifolium |
Narrowleaf Blue Eyed grass |
| Smilax rotundifolia |
Roundleaf Greenbrier |
| Solidago canadensis |
Canada Goldenrod |
| Solidago flexicaulis |
Zigzag Goldenrod |
| Solidago gigantea |
Giant Goldenrod |
| Solidago missouriensis |
Missouri Goldenrod |
| Solidago nemoralis |
Old Field Goldenrod |
| Sorbus americana |
American Mountain Ash |
| Sorbus aucuparia |
European Mountain Ash |
| Sorghum bicolor |
Sorghum |
| Sorghum bicolor ssp drummondii |
Sudangrass |
| Sparganium americanum |
American Bur Reed |
| Sparganium eurycarpum |
Great Bur Reed |
| Spartina gracilis |
Alkali Cordgrass |
| Sphaeralcea coccinea |
Scarlet Globemallow |
| Sphenopholis obtusata |
Prairie Wedgescale |
| Spiraea alba |
White Meadowsweet |
| Spiraea betulifolia |
White Spirea |
| Spiraea tomentosa |
Steeplebush |
| Spiranthes cernua |
Nodding Ladies Tress |
| Spiranthes romanzoffiana |
Hooded Ladies' Tresses |
| Spirodela polyrrhiza |
Common Duckmeat |
| Sporobolus cryptandrus |
Sand Dropseed |
| Sporobolus heterolepis |
Prairie Dropseed |
| Stachys palustris |
Woundwort |
| Stachys tenuifolia |
Narrow-Leaved Hedge Nettle |
| Stellaria longifolia |
Long-Leaved Chickweed |
| Stellaria longipes |
Longstalk Starwort |
| Stuckenia pectinatus |
Sago Pondweed |
| Symphoricarpos albus |
Common Snowberry |
| Symphoricarpos occidentalis |
Wolfberry |
| Symphoricarpos orbiculatus |
Coralberry |
| Symphyotrichum cordifolium |
Common Blue Wood aster |
| Symphyotrichum prenanthoides |
Crookedstem Aster |
| Symplocarpus foetidus |
Skunk Cabbage |
| Syringa vulgaris |
Common Lilac |
| Teucrium canadense |
Canada Germander |
| Thuja occidentalis |
White Cedar |
| Tilia americana |
Basswood |
| Tragopogon dubius |
Yellow Goat's Beard |
| Tragopogon pratensis |
Goat's Beard |
| Trichophorum caespitosum |
Tufted Bulrush |
| Tridens flavus |
Purpletop Tridens |
| Trifolium hybridum |
Alsike Clover |
