680 records for WASHINGTON County Abutilon theophrastii BUTTONWEED Acalypha rhomboidea THREE-SEEDED MERCURY Acalypha virginica THREE-SEEDED MERCURY Acer negundo ASH-LEAVED MAPLE Acer rubrum RED MAPLE Acer saccharinum RIVER MAPLE Acer saccharum HARD MAPLE Achillea millefolium COMMON MILFOIL Adiantum pedatum MAIDENHAIR FERN Aesculus glabra OHIO BUCKEYE Agalinis tenuifolia SLENDER FALSE FOXGLOVE Agrimonia parviflora SWAMP AGRIMONY Agrimonia rostellata WOODLAND AGRIMONY Agropyron repens COUCH GRASS Agrostemma githago CORN COCKLE Agrostis alba RED TOP Agrostis perennans AUTUMN BENT GRASS Agrostis scabra ROUGH BENT GRASS Ailanthus altissima TREE-OF-HEAVEN Alisma plantago aquatica parviflorum COMMON WATER PLANTAIN Allium canadense WILD GARLIC Allium vineale FIELD GARLIC Alopecurus carolinianus ANNUAL FOXTAIL Amaranthus albus TUMBLEWEED Amaranthus hybridus GREEN AMARANTH Amaranthus spinosus SPINY PIGWEED Ambrosia artemisiifolia BITTERWEED Ambrosia bidentata LANCELEAF RAGWEED Ambrosia trifida BUFFALO WEED Amelanchier arborea JUNEBERRY Ammannia coccinea LONG-LEAVED AMMANNIA Amorpha fruticosa FALSE INDIGO BUSH Ampelopsis cordata RACCOON GRAPE Amphicarpa bracteata HOG PEANUT Amsonia tabernaemontana BLUE STAR Andropogon gerardii BIG BLUESTEM Andropogon virginicus BROOM SEDGE Anemone virginiana TALL ANEMONE Antennaria plantaginifolia EVERLASTING Anthemis cotula DOG FENNEL Apocynum cannabinum DOGBANE Apocynum sibiricum INDIAN HEMP Arenaria serpyllifolia THYME-LEAVED SANDWORT Arisaema dracontium GREEN DRAGON Arisaema triphyllum INDIAN TURNIP Aristida longespica THREE AWN Aristida oligantha PLAINS THREE AWN GRASS Armoracia rusticana HORSERADISH Aruncus dioicus GOAT'S-BEARD Arundinaria gigantea GIANT CANE Asclepias hirtella TALL GREEN MILKWEED Asclepias incarnata SWAMP MILKWEED Asclepias sullivantii PRAIRIE MILKWEED Asclepias syriaca COMMON MILKWEED Asclepias tuberosa interior BUTTERFLYWEED Asclepias verticillata HORSETAIL MILKWEED Asclepias viridiflora GREEN MILKWEED Asclepias viridis GREEN-FLOWERED MILKWEED Asimina triloba BANANA TREE Asparagus officinalis GARDEN ASPARAGUS Asplenium platyneuron EBONY SPLEENWORT Aster ericoides HEATH ASTER Aster ericoides prostratus HEATH ASTER Aster lateriflorus SIDE-FLOWERED ASTER Aster ontarionis ONTARIO ASTER Aster pilosus HAIRY ASTER Aster praealtus WILLOW-LEAVED ASTER Aster simplex PANICLED ASTER Aster turbinellus ASTER Athyrium angustum LADY FERN Baptisia lactea WHITE WILD INDIGO Barbarea vulgaris arcuata WINTER CRESS Bidens aristosa SWAMP MARIGOLD Bidens bipinnata SPANISH NEEDLES Bidens tripartita BEGGARTICK Bidens vulgata STICKTIGHT Blephilia ciliata PAGODA PLANT Boehmeria cylindrica FALSE NETTLE Boltonia asteroides FALSE ASTER Boltonia diffusa FALSE ASTER Botrychium dissectum obliquum BRONZE FERN Botrychium virginianum RATTLESNAKE FERN Brachyelytrum erectum LONG-AWNED WOOD GRASS Bromus brizaeformis QUAKE GRASS Bromus commutatus HAIRY BROME Bromus inermis AWNLESS BROME GRASS Bromus pubescens CANADA BROME GRASS Bromus racemosus BALD BROME Bromus secalinus CHEAT Bromus tectorum CHEAT GRASS BROME Buglossoides arvense CORN GROMWELL Callitriche terrestris TERRESTRIAL STARWORT Calystegia sepium americana AMERICAN BINDWEED Camassia scilloides WILD HYACINTH Campsis radicans TRUMPET CREEPER Capsella bursa-pastoris SHEPERD'S-PURSE Cardamine bulbosa BULB BITTERCRESS Cardamine hirsuta HAIRY BITTER CRESS Cardamine parviflora arenicola SMALL-FLOWERED BITTER CRESS Cardamine pensylvanica BITTER CRESS Carex annectens xanthocarpa SEDGE Carex artitecta SEDGE Carex aurea GOLDEN SEDGE Carex bicknellii BICKNELL SEDGE Carex blanda WOODLAND SEDGE Carex brevior FESCUE SEDGE Carex bushii SEDGE Carex caroliniana SEDGE Carex cristatella SEDGE Carex davisii DAVIS SEDGE Carex gravida HEAVY SEDGE Carex grayi BUR SEDGE Carex lanuginosa WOOLY SEDGE Carex lupulina HOP SEDGE Carex muskingumensis SEDGE Carex rosea Carex shortiana SEDGE Carex squarrosa SEDGE Carex stipata PRICKLY SEDGE Carex tribuloides SEDGE Carex typhina SEDGE Carex vulpinoidea FOX SEDGE Carya cordiformis BITTERNUT HICKORY Carya glabra PIGNUT HICKORY Carya illinoensis PECAN Carya laciniosa BIG SHELLBARK Carya ovalis FALSE SHAGBARK HICKORY Carya ovata SCALY-BARK HICKORY Carya tomentosa MOCKERNUT HICKORY Cassia fasciculata GOLDEN CASSIA Ceanothus americanus NEW JERSEY TEA Celastrus scandens BITTERSWEET Celtis laevigata SUGARBERRY Celtis occidentalis HACKBERRY Celtis occidentalis canina HACKBERRY Cenchrus longispinus MAT SANDBUR Cephalanthus occidentalis BUTTONBUSH Cerastium nutans NODDING MOUSE-EAR CHICKWEED Cerastium vulgatum COMMON MOUSE-EAR CHICKWEED Cercis canadensis EASTERN REDBUD Chaerophyllum procumbens WILD CHERVIL Chaerophyllum tainturieri WILD CHERVIL Chamaemelum nobilis GARDEN CHAMOMILE Chamaesyce maculata NODDING SPURGE Chamaesyce supina MILK SPURGE Chasmanthium latifolium SEA OATS Chenopodium album LAMB'S QUARTERS Chenopodium gigantospermum MAPLE-LEAVED GOOSEFOOT Cichorium intybus BLUE SAILORS Cicuta maculata WATER HEMLOCK Cinna arundinacea STOUTWOOD REED Circaea lutetiana canadensis ENCHANTER'S NIGHTSHADE Cirsium altissimum TALL THISTLE Cirsium discolor FIELD THISTLE Claytonia virginica SPRING BEAUTY Clematis pitcheri LEATHER FLOWER Cleome hassleriana SPIDER FLOWER Comandra umbellata BASTARD TOAD-FLAX Commelina communis COMMON DAY FLOWER Commelina diffusa DAY FLOWER Conium maculatum POISON HEMLOCK Consolida ambigua ROCKET LARKSPUR Convolvulus arvensis FIELD BINDWEED Conyza canadensis HORSEWEED Coreopsis palmata PRAIRIE COREOPSIS Coreopsis pubescens STAR TICKSEED Coreopsis tripteris TALL COREOPSIS Cornus florida FLOWERING DOGWOOD Cornus obliqua PALE DOGWOOD Cornus racemosa GRAY DOGWOOD Corydalis flavula PALE CORYDALIS Corylus americana AMERICAN FILBERT Crataegus crus-galli COCK-SPUR THORN Crataegus mollis RED HAW Crataegus viridis GREEN THORN Crotalaria sagittalis RATTLEBOX Croton capitatus CAPITATE CROTON Croton monanthogynus CROTON Crotonopsis elliptica RUSHFOIL Cryptotaenia canadensis HONEWORT Cunila origanoides DITTANY Cuphea viscosissima BLUE WAXWEED Cuscuta glomerata DODDER Cuscuta gronovii DODDER Cuscuta indecora DODDER Cuscuta polygonorum SMARTWEED DODDER Cynanchum laeve BLUE VINE Cyperus aristatus BEARDED FLAT SEDGE Cyperus esculentus CHUFA Cyperus filiculmis macilentus Cyperus ovularis HEDGEHOG CLUB RUSH Cyperus pseudovegetus Cyperus strigosus STRAW COLORED FLATSEDGE Cystopteris protrusa FRAGILE FERN Dactylis glomerata ORCHARD GRASS Dalea candida WHITE PRAIRIE CLOVER Danthonia spicata CURLY GRASS Dasistoma macrophylla MULLEIN FOXGLOVE Datura stramonium JIMSONWEED Daucus carota QUEEN-ANNE'S-LACE Delphinium tricorne DWARF LARKSPUR Dentaria laciniata PEPPER-ROOT Desmodium cuspidatum TICK TREFOIL Desmodium glabellum TICK TREFOIL Desmodium nuttallii NUTTALL'S TICK TREFOIL Desmodium paniculatum PANICLED TICK TREFOIL Desmodium pauciflorum BEGGAR'S LICE Desmodium sessilifolium SESSILE-LEAVED TICKTREFOIL Dianthus armeria DEPTFORD PINK Dicentra cucullaria DUTCHMAN'S-BREECHES Dichanthelium acuminatum fasciculatum PANIC GRASS Dichanthelium acuminatum lindheimeri PANIC GRASS Dichanthelium clandestinum BROAD-LEAVED PANIC GRASS Dichanthelium commutatum PANIC GRASS Dichanthelium dichotomum FORKED PANIC GRASS Dichanthelium latifolium Dichanthelium microcarpon SMALL FRUITED PANIC GRASS Dichanthelium polyanthes PANIC GRASS Dichanthelium sphaerocarpon Digitaria ischaemum SMOOTH CRAB GRASS Digitaria sanguinalis HAIRY CRAB GRASS Diodia teres POORJOE Dioscorea villosa WILD YAM Diospyros virginiana PERSIMMON Dodecatheon meadia SHOOTING STAR Draba brachycarpa SHORT-FRUITED WHITLOW GRASS Echinacea pallida PALE PURPLE CONEFLOWER Echinochloa muricata BARNYARD GRASS Echinochloa muricata wiegandii BARNYARD GRASS Eclipta prostrata YERBA DE TAJO Eleocharis obtusa detonsa SPIKE RUSH Eleocharis palustris Eleocharis verrucosa SLENDER SPIKE RUSH Eleusine indica GOOSE GRASS Ellisia nyctelea AUNT LUCY Elymus canadensis CANADA WILD RYE Elymus hystrix BOTTLEBRUSH GRASS Elymus villosus HAIRY WILD RYE Elymus virginicus LYME GRASS Equisetum arvense COMMON HORSETAIL Equisetum hyemale affine SCOURING RUSH Eragrostis cilianensis STINK GRASS Eragrostis hypnoides CREEPING LOVE GRASS Eragrostis pectinacea CAROLINA LOVE GRASS Eragrostis spectabilis PURPLE LOVE GRASS Erigenia bulbosa HARBINGER-OF-SPRING Erigeron annuus ANNUAL FLEABANE Erigeron philadelphicus MARSH FLEABANE Eriophila verna MOUSE-EARED WHITLOW GRASS Eryngium yuccifolium RATTLESNAKE MASTER Erythronium albidum WHITE ADDER'S TONGUE Eupatorium altissimum TALL BONESET Eupatorium coelestinum BLUE BONSET Eupatorium perfoliatum COMMON BONESET Eupatorium purpureum GREEN-STEMMED JOE-PYE WEED Eupatorium rugosum WHITE SNAKEROOT Eupatorium serotinum LATE BONESET Euphorbia corollata FLOWERING SPURGE Euphorbia cyparissias CYPRESS SPURGE Euthamia graminifolia GRASSLEAF GOLDENROD Festuca obtusa NODDING FESCUE Festuca pratensis ENGLISH BLUEGRASS Forestiera acuminata SWAMP PRIVET Fragaria americana HILLSIDE STRAWBERRY Frasera caroliniensis AMERICAN COLUMBO Fraxinus americana WHITE ASH Fraxinus pennsylvanica GREEN ASH Fraxinus profunda PUMPKIN ASH Froelichia gracilis COTTONWEED Galium aparine ANNUAL BEDSTRAW Galium circaezans WILD LICORICE Galium concinnum SHINING BEDSTRAW Galium obtusum WILD MADDER Galium tinctorium STIFF BEDSTRAW Galium triflorum SWEET-SCENTED BEDSTRAW Gaura biennis BUTTERFLY-WEED Gaura longiflora Gentiana puberulenta DOWNY GENTIAN Geranium carolinianum WILD CRANESBILL Geranium maculatum WILD GERANIUM Geum canadense WHITE AVENS Geum vernum SPRING AVENS Glandularia canadensis ROSE VERBENA Gleditsia triacanthos HONEY LOCUST Glyceria striata FOWL MANNA GRASS Gnaphalium obtusifolium CATFOOT Gnaphalium purpureum EARLY CUDWEED Hedeoma pulegioides AMERICAN PENNYROYAL Hedyotis caerulea BLUETS Hedyotis purpurea calycosa BLUETS Hedyotis pusilla SMALL BLUETS Helenium amarum ROCK BITTERWEED Helenium flexuosum PURPLE-HEADED SNEEZEWEED Helianthus annuus COMMON SUNFLOWER Helianthus divaricatus DIVERGENT SUNFLOWER Helianthus giganteus GIANT SUNFLOWER Helianthus grosseserratus SAWTOOTH SUNFLOWER Helianthus mollis ASHY SUNFLOWER Helianthus petiolaris KANSAS SUNFLOWER Helianthus rigidus PRAIRIE SUNFLOWER Helianthus strumosus PALE-LEAVED SUNFLOWER Helianthus tuberosus subcanescens JERUSALEM ARTICHOKE Heliopsis helianthoides FALSE SUNFLOWER Heliotropium indicum INDIAN HELIOTROPE Hemerocallis fulva DAY LILY Heracleum lanatum COW PARSNIP Heuchera americana hirsuticaulis TALL ALUMROOT Hibiscus laevis HALBERD-LEAVED ROSE MALLOW Hibiscus lasiocarpus HAIRY ROSE MALLOW Hibiscus trionum FLOWER-OF-AN-HOUR Holosteum umbellatum JAGGED CHICKWEED Hordeum jubatum FOX-TAIL BARLEY Hordeum pusillum LITTLE BARLEY Hordeum vulgare COMMON BARLEY Hydrangea arborescens WILD HYDRANGEA Hydrastis canadensis GOLDEN SEAL Hydrophyllum macrophyllum LARGE-LEAF WATERLEAF Hypericum drummondii NITS-AND-LICE Hypericum mutilum DWARF ST. JOHNS-WORT Hypericum perforatum COMMON ST. JOHNS-WORT Hypericum punctatum SPOTTED ST. JOHNS-WORT Hypericum sphaerocarpum ROUND-FRUITED ST. JOHNS-WORT Hypoxis hirsuta COMMON GOLDSTARGRASS Ilex decidua SWAMP HOLLY Impatiens capensis JEWELWEED Ipomoea coccinea RED MORNING-GLORY Ipomoea hederacea IVY-LEAVED MORNING GLORY Ipomoea lacunosa SMALL WHITE MORNING-GLORY Ipomoea pandurata WILD SWEET POTATO VINE Ipomoea purpurea COMMON MORNING-GLORY Ipomopsis rubra STANDING CYPRESS Isopyrum biternatum FALSE RUE ANEMONE Juglans nigra BLACK WALNUT Juncus acuminatus KNOTTY-LEAVED RUSH Juncus biflorus TWO-FLOWERED RUSH Juncus brachycarpus RUSH Juncus bufonius TOAD RUSH Juncus effusus solutus COMMON RUSH Juncus interior INLAND RUSH Juncus nodatus RUSH Juncus nodosus JOINTED RUSH Juncus tenuis PATH RUSH Juncus torreyi TORREY RUSH Juniperus virginiana EASTERN RED CEDAR Justicia americana WATER WILLOW Koeleria macrantha CRESTED HAIR GRASS Krigia dandelion DWARF DANDELION Kummerowia stipulacea KOREAN CLOVER Kummerowia striata JAPANESE LESPEDEZA Lactuca canadensis CANADA LETTUCE Lactuca floridana BLUE LETTUCE Lactuca saligna WILLOW-LEAVED LETTUCE Lactuca serriola COMPASS PLANT Lamium amplexicaule HENBIT Lamium purpureum PURPLE DEAD NETTLE Lechea tenuifolia NARROW-LEAVED PINWEED Leersia lenticularis CATCHFLY GRASS Leersia oryzoides RICE CUTGRASS Leersia virginica WHITE GRASS Lemna minor COMMON DUCKWEED Leonurus cardiaca MOTHERWORT Lepidium virginicum COMMON PEPPERGRASS Leptochloa fascicularis BEARDED SPRANGLE TOP Lespedeza capitata BUSH CLOVER Lespedeza cuneata CHINESE BUSH CLOVER Lespedeza procumbens TRAILING BUSH CLOVER Lespedeza violacea VIOLET BUSH CLOVER Lespedeza virginica SLENDER BUSH CLOVER Liatris aspera ROUGH BLAZING STAR Liatris pycnostachya BUTTON SNAKEROOT Liatris scabra BLAZING STAR Liatris squarrosa BLAZING STAR Lilium michiganense MICHIGAN LILY Linaria vulgaris BUTTER-AND-EGGS Lindera benzoin FEVERBUSH Lindernia dubia FALSE PIMPERNEL Linum medium texanum SMALL YELLOW FLAX Linum virginianum SLENDER YELLOW FLAX Liriodendron tulipifera TULIP POPLAR Lithospermum canescens HOARY PUCCOON Lobelia cardinalis CARDINAL-FLOWER Lobelia inflata INDIAN TOBACCO Lobelia siphilitica BLUE CARDINAL-FLOWER Lobelia spicata SPIKED LOBELIA Lolium perenne CRESTED RYE GRASS Lonicera japonica JAPANESE HONEYSUCKLE Ludwigia alternifolia SEEDBOX Ludwigia palustris americana MARSH PURSLANE Ludwigia peploides glabrescens CREEPING PRIMROSE WILLOW Ludwigia polycarpa FALSE LOOSESTRIFE Lycopus americanus COMMON WATER HOREHOUND Lycopus virginicus BUGLE WEED Lysimachia ciliata FRINGED LOOSESTRIFE Lysimachia lanceolata LANCE-LEAVED LOOSESTRIFE Lysimachia nummularia MONEYWORT Lythrum alatum WINGED LOOSESTRIFE Maclura pomifera HEDGE APPLE Malus ioensis IOWA CRAB APPLE Malva neglecta CHEESES Matricaria chamomilla GERMAN CHAMOMILE Medicago lupulina BLACK MEDIC Medicago sativa ALFALFA Melica nitens THREE-FLOWERED MELIC GRASS Melilotus alba WHITE SWEET CLOVER Melilotus officinalis YELLOW SWEET CLOVER Menispermum canadense MOONSEED Mertensia virginica BLUEBELLS Mimulus alatus WINGED MONKEY FLOWER Mirabilis nyctaginea WILD FOUR-O'CLOCK Mollugo verticillatus CARPETWEED Monarda bradburiana MONARDA Monarda fistulosa WILD BERGAMOT Morus alba WHITE MULBERRY Morus rubra RED MULBERRY Muhlenbergia sobolifera MUHLY Muhlenbergia sylvatica MUHLY Myosotis verna SCORPION GRASS Myosurus minimus MOUSETAIL Najas guadalupensis SOUTHERN NAIAD Najas minor Nelumbo lutea AMERICAN LOTUS Nepeta cataria CATNIP Nothoscordum bivalve CROW POISON Nuphar luteum macrophyllum SPATTERDOCK Oenothera biennis EVENING PRIMROSE Oenothera laciniata RAGGED EVENING PRIMROSE Oenothera pilosella PRAIRIE SUNDROPS Onoclea sensibilis SENSITIVE FERN Ostrya virginiana HOP HORNBEAM Oxalis dillenii YELLOW WOOD SORREL Oxalis stricta YELLOW WOOD SORREL Oxalis violacea PURPLE OXALIS Panicum capillare WITCH GRASS Panicum dichotomiflorum FALL PANICUM Panicum rigidulum MUNRO GRASS Panicum virgatum PRAIRIE SWITCHGRASS Parietaria pensylvanica PENNSYLVANIA PELLITORY Paronychia canadensis FORKED CHICKWEED Paronychia fastigiata FORKED CHICKWEED Parthenium integrifolium AMERICAN FEVERFEW Parthenocissus quinquefolia VIRGINIA CREEPER Paspalum ciliatifolium BEADGRASS Paspalum floridanum GIANT BEADGRASS Paspalum fluitans SWAMP BEADGRASS Paspalum laeve SMOOTH LENS GRASS Paspalum pubiflorum glabrum BEADGRASS Passiflora lutea glabriflora SMALL PASION-FLOWER Pastinaca sativa PARSNIP Pedicularis canadensis LOUSEWORT Penstemon calycosus SMOOTH BEARD-TONGUE Penstemon digitalis FOXGLOVE BEARD-TONGUE Penstemon pallidus PALE BEARD-TONGUE Penthorum sedoides DITCH STONECROP Perideridia americana Perilla frutescens BEEFSTEAK PLANT Phacelia ranunculacea Phalaris arundinacea REED CANARY GRASS Phalaris canariensis BIRDSEED GRASS Phleum pratense TIMOTHY Phlox divaricata laphamii BLUE PHLOX Phlox glaberrima interior SMOOTH PHLOX Phlox paniculata GARDEN PHLOX Phlox pilosa DOWNY PHLOX Phryma leptostachya LOPSEED Phyla lanceolata FOG-FRUIT Phyllanthus caroliniensis PHYLLANTHUS Physalis heterophylla GROUND CHERRY Physostegia speciosa FALSE DRAGONHEAD Phytolacca americana POKEWEED Pilea pumila CANADA CLEARWEED Plantago aristata BRACTED PLANTAIN Plantago lanceolata BUCKHORN Plantago pusilla SMALL PLANTAIN Plantago rugelii RED-STALKED PLANTAIN Plantago virginica DWARF PLANTAIN Platanus occidentalis BUTTONWOOD Poa annua ANNUAL BLUEGRASS Poa chapmaniana ANNUAL BLUEGRASS Poa compressa CANADIAN BLUEGRASS Poa pratensis KENTUCKY BLUEGRASS Podophyllum peltatum MAYAPPLE Poinsettia dentata WILD POINSETTIA Polemonium reptans JACOB'S-LADDER Polygala sanguinea FIELD MILKWORT Polygonatum commutatum GREAT SOLOMON SEAL Polygonum arenastrum KNOTWEED Polygonum convolvulus BLACK BIRDWEED Polygonum hydropiperoides MILD WATER PEPPER Polygonum lapathifolium CURTTOP LADY'S THUMB Polygonum pensylvanicum laevigatum PENNSYLVANIA SMARTWEED Polygonum persicaria SPOTTED LADY'S THUMB Polygonum punctatum DOTTED SMARTWEED Polygonum sagittatum ARROWLEAF TEARTHUMB Polygonum scandens CLIMBING BUCKWHEAT Polygonum virginianum VIRGINIA KNOTWEED Polystichum acrostichoides CHRISTMAS FERN Populus deltoides EASTERN COTTONWOOD Populus heterophylla SWAMP COTTONWOOD Porteranthus stipulatus INDIAN PHYSIC Portulaca oleracea PURSLANE Potamogeton crispus BEGINNER'S PONDWEED Potamogeton foliosus LEAFY PONDWEED Potamogeton nodosus AMERICAN PONDWEED Potamogeton pusillus BABY PONDWEED Potentilla norvegica ROUGH CINQUEFOIL Potentilla recta SULFUR CINQUEFOIL Potentilla simplex COMMON CINQUEFOIL Prunella vulgaris elongata SELF-HEAL Prunus hortulana WILD GOOSE PLUM Prunus serotina WILD BLACK CHERRY Psoralea onobrychis FRENCH GRASS Psoralea psoralioides eglandulosa SAMPSON'S SNAKEROOT Ptelea trifoliata WAFER ASH Pteridium aquilinum latiusculum BRACKEN FERN Pycnanthemum tenuifolium SLENDER MOUNTAIN MINT Quercus alba WHITE OAK Quercus bicolor SWAMP WHITE OAK Quercus imbricaria JACK OAK Quercus lyrata OVERCUP OAK Quercus macrocarpa BURR OAK Quercus marilandica BLACKJACK OAK Quercus palustris PIN OAK Quercus prinoides acuminata CHINKAPIN OAK Quercus rubra NORTHERN RED OAK Quercus stellata POST OAK Quercus velutina BLACK OAK Ranunculus abortivus LITTLE-LEAF BUTTERCUP Ranunculus laxicaulis SPEARWORT Ranunculus sceleratus CURSED CROWFOOT Ranunculus septentrionalis SWAMP BUTTERCUP Ratibida pinnata DROOPING CONEFLOWER Rhus copallina DWARF SUMAC Rhus glabra SMOOTH SUMAC Ribes odoratum BUFFALO CURRENT Robinia pseudoacacia BLACK LOCUST Rorippa sessiliflora SESSILE-FLOWERED CRESS Rosa setigera ILLINOIS ROSE Rotala ramosior TOOTH-CUP Rubus allegheniensis COMMON BLACKBERRY Rubus argutus HIGHBUSH BLACKBERRY Rubus flagellaris DEWBERRY Rubus frondosus BLACKBERRY Rubus pensylvanicus BLACKBERRY Rudbeckia hirta BLACK-EYED SUSAN Rudbeckia laciniata CUTLEAF CONEFLOWER Rudbeckia subtomentosa FRAGRANT CONEFLOWER Ruellia humilis HAIRY RUELLIA Ruellia strepens SMOOTH RUELLIA Rumex acetosella COMMON SORREL Rumex altissimus PALE DOCK Rumex crispus CURLY DOCK Rumex mexicanus DOCK Rumex verticillatus SWAMP DOCK Sabatia angularis MARSH PINK Sabatia campestris PRAIRIE ROSE GENTIAN Sagittaria calycina ARROWLEAF Salix alba WHITE WILLOW Salix exigua SANDBAR WILLOW Salix humilis PRAIRIE WILLOW Salix nigra BLACK WILLOW Salsola iberica RUSSIAN THISTLE Sambucus canadensis COMMON ELDER Sanguinaria canadensis BLOODROOT Sanicula canadensis CANADIAN BLACK SNAKEROOT Sanicula gregaria COMMON SNAKEROOT Saponaria officinalis BOUNCING BET Sassafras albidum RED SASSAFRAS Saururus cernuus LIZARD'S TAIL Schizachyrium scoparium LITTLE BLUESTEM Scirpus atrovirens DARK GREEN RUSH Scrophularia marilandica LATE FIGWORT Scutellaria incana DOWNY SKULLCAP Scutellaria ovata HEART-LEAVED SKULLCAP Scutellaria parvula SMALL SKULLCAP Secale cereale RYE Senecio glabellus BUTTERWEED Setaria faberi GIANT FOXTAIL Setaria glauca PIGEON GRASS Setaria italica FOXTAIL MILLET Setaria viridis COMMON FOXTAIL Sibara virginica VIRGINIA ROCK CRESS Sida spinosa PRICKLY SIDA Silene stellata STARRY CAMPION Silphium integrifolium WHOLELEAF ROSINWEED Silphium laciniatum COMPASS-PLANT Silphium perfoliatum CUP PLANT Silphium terebinthinaceum DOCK ROSIN-WEED Sisyrinchium albidum BLUE-EYED GRASS Smilacina racemosa FALSE SOLOMON SEAL Smilax bona-nox BULLBRIER Smilax hispida BRISTLY GREENBRIER Smilax lasioneuron COMMON CARRION FLOWER Smilax pulverulenta CARRION FLOWER Smilax rotundifolia CAT BRIERS Solanum carolinense HORSE-NETTLE Solanum ptycanthum BLACK NIGHTSHADE Solidago canadensis CANADA GOLDENROD Solidago juncea EARLY GOLDENROD Solidago missouriensis MISSOURI GOLDENROD Solidago nemoralis DYERSWEED GOLDENROD Solidago rigida RIGID GOLDENROD Solidago ulmifolia ELM-LEAVED GOLDENROD Sonchus oleraceus COMMON SOWTHISTLE Sorghastrum nutans INDIAN GRASS Sorghum halepense EGYPTIAN MILLET Spartina pectinata FRESHWATER CORD GRASS Spermacoce glabra SMOOTH BUTTONWEED Sphenopholis obtusata PRAIRIE WEDGE GRASS Spirodela polyrhiza BIG DUCKWEED Sporobolus asper DROP SEED Staphylea trifolia BLADDERNUT Stellaria media COMMON CHICKWEED Strophostyles helvola WILD BEAN Strophostyles leiosperma WILD BEAN Stylosanthes biflora PENCIL FLOWER Symphoricarpos orbiculatus BUCKBRUSH Symphytum officinale COMMON COMFREY Taraxacum laevigatum RED-SEEDED DANDELION Taraxacum officinale COMMON DANDELION Teucrium canadense virginicum AMERICAN GERMANDER Thalictrum dasycarpum hypoglaucum MEADOW RUE Thalictrum revolutum WAXY MEADOW RUE Thalictrum thalictroides RUE ANEMONE Thaspium barbinode HAIRY MEADOW PARSNIP Thaspium trifoliatum MEADOW PARSNIP Tilia americana AMERICAN LINDEN Tomanthera auriculata AURICULATE FALSE FOXGLOVE Toxicodendron radicans POISON IVY Tradescantia ohiensis SPIDERWORT Tradescantia subaspera SPIDERWORT Tradescantia virginiana SPIDERWORT Tridens flavus FALSE RED TOP Trifolium campestre LOW HOP CLOVER Trifolium hybridum ALSIKE CLOVER Trifolium pratense RED CLOVER Trifolium repens WHITE CLOVER Trillium recurvatum RED TRILLIUM Triodanis perfoliata VENUS' LOOKING-GLASS Triticum aestivum BEARDED WHEAT Typha latifolia CATTAIL Ulmus americana AMERICAN ELM Ulmus rubra SLIPPERY ELM Uvularia grandiflora BIG MERRY BELLS Valerianella radiata CORN SALAD Verbascum blattaria MOTH MULLEIN Verbascum thapsus WOOLLY MULLEIN Verbena bracteata CREEEPING VERVAIN Verbena hastata BLUE VERVAIN Verbena simplex NARROW-LEAVED VERVAIN Verbena stricta HOARY VERVAIN Verbena urticifolia WHITE VERVIAN Verbesina alternifolia WING STEM Verbesina helianthoides YELLOW CROWNBEARD Vernonia fasciculata COMMON IRONWEED Vernonia gigantea TALL IRON WEED Vernonia missurica MISSOURI IRONWEED Veronica arvensis CORN SPEEDWELL Veronica peregrina PURSLANE SPEEDWELL Veronica polita SPEEDWELL Veronicastrum virginicum CULVER'S ROOT Viburnum prunifolium BLACK HAW Vinca minor COMMON PERIWINKLE Viola missouriensis MISSOURI VIOLET Viola obliqua MARSH BLUE VIOLET Viola pubescens eriocarpa SMOOTH YELLOW VIOLET Viola rafinesquii JOHNNY-JUMP-UP Viola sagittata ARROW-LEAVED VIOLET Viola sororia WOOLLY BLUE VIOLET Viola striata COMMON WHITE VIOLET Vitis aestivalis SUMMER GRAPE Vitis cinerea WINTER GRAPE Vitis palmata CATBIRD GRAPE Vitis riparia RIVERVBANK GRAPE Vitis vulpina FROST GRAPE Vulpia octoflora SIX-WEEKS FESCUE Wisteria frutescens WISTERIA Woodsia obtusa COMMON WOODSIA Xanthium strumarium canadensis COCKLE BUR Xanthium strumarium glabratum COCKLE BUR Yucca flaccida ADAM'S NEEDLE