Home » Search: All Plants Native in Central Corn Belt Plains

1627 Plants Found

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Ordered by scientific name.

Scientific Name	Common Name	†	Map‡
Nuphar variegata Engelm. ex Durand	Variegated Pond-Lily
Nuttallanthus canadensis (L.) D.A. Sutton	Canada toadflax
Nymphaea odorata Aiton	American white waterlily
Nyssa sylvatica Marshall	Black Tupelo	✓
Oenothera biennis L.	Common Evening Primrose
Oenothera clelandii "W. Dietr.	Cleland's evening primrose
Oenothera filiformis (Small) W.L. Wagner & Hoch	Longflower Beeblossom
Oenothera fruticosa L.	Narrowleaf Evening Primrose
Oenothera gaura W.L. Wagner & Hoch	Biennial Beeblossom
Oenothera grandis (Britton) Smyth	showy evening primrose
Oenothera laciniata Hill	Cutleaf Evening Primrose
Oenothera macrocarpa Nutt.	bigfruit evening primrose
Oenothera nutans Atk. & Bartlett	nodding evening primrose
Oenothera oakesiana (A. Gray) J.W. Robbins ex S. Watson & J.M. Coult.	Oakes' Evening Primrose
Oenothera parviflora L.	northern evening primrose
Oenothera perennis L.	Little Evening Primrose
Oenothera pilosella Raf.	Meadow Evening Primrose
Oenothera serrulata Nutt.	Yellow Sundrops
Oenothera villosa Thunb.	Hairy Evening Primrose
Oligoneuron ohioense (Frank ex Riddell) G.N. Jones	Ohio goldenrod
Oligoneuron riddellii (Frank ex Riddell) Rydb.	Riddell's goldenrod
Oligoneuron rigidum (L.) Small	Stiff Goldenrod
Onoclea sensibilis L.	Sensitive Fern
Ophioglossum pusillum Raf.	northern adderstongue
Ophioglossum vulgatum L.	southern adderstongue
Opuntia humifusa (Raf.) Raf.	Eastern prickly pear
Opuntia macrorhiza Engelm.	twistspine pricklypear
Orbexilum onobrychis (Nutt.) Rydb.	French-grass
Orbexilum pedunculatum (Mill.) Rydb.	Sampson's snakeroot
Orobanche fasciculata Nutt.	clustered broomrape
Orobanche ludoviciana Nutt.	Louisiana Broomrape
Orobanche uniflora L.	oneflowered broomrape
Oryzopsis asperifolia Michx.	roughleaf ricegrass
Osmorhiza claytonii (Michx.) C.B. Clarke	Clayton's sweetroot
Osmorhiza longistylis (Torr.) DC.	longstyle sweetroot
Osmunda claytoniana L.	interrupted fern
Osmunda spectabilis Willd.	American Royal Fern
Osmundastrum cinnamomeum (L.) C.Presl	Cinnamon Fern
Ostrya virginiana (Mill.) K. Koch	American Hophornbeam
Oxalis dillenii Jacq.	Slender Yellow Woodsorrel
Oxalis stricta L.	Common Yellow Oxalis
Oxalis violacea L.	Violet Woodsorrel
Oxypolis rigidior (L.) Raf.	stiff cowbane
Packera aurea (L.) Á. Löve & D. Löve	Golden Ragwort
Packera glabella (Poir.) C. Jeffrey	Butterweed
Packera obovata (Muhl. ex Willd.) W.A. Weber & Á. Löve	roundleaf ragwort
Packera paupercula (Michx.) Á. Löve & D. Löve	Balsam Groundsel
Packera plattensis (Nutt.) W.A. Weber & Á. Löve	prairie groundsel
Panax quinquefolius L.	American ginseng
Panicum capillare L.	witchgrass
Panicum dichotomiflorum Michx.	Fall Panicgrass
Panicum flexile (Gattinger) Scribn.	wiry panicgrass
Panicum philadelphicum Bernh. ex Trin.	Philadelphia panicgrass
Panicum rigidulum Bosc ex Nees	Redtop Panicgrass
Panicum verrucosum Muhl.	warty panicgrass
Panicum virgatum L.	Switchgrass
Parathelypteris noveboracensis (L.) Ching	New York Fern
Parietaria pensylvanica Muhl. ex Willd.	Pennsylvania Pellitory
Parnassia glauca Raf.	fen grass of Parnassus
Paronychia canadensis (L.) Alph. Wood	smooth forked nailwort
Paronychia fastigiata (Raf.) Fernald	hairy forked nailwort
Parthenium integrifolium L.	Wild Quinine
Parthenocissus quinquefolia (L.) Planch.	Virginia Creeper
Parthenocissus vitacea (Knerr) Hitchc.	Woodbine
Paspalum laeve Michx.	Field Paspalum
Paspalum pubiflorum Rupr. ex Fourn.	hairyseed paspalum
Paspalum repens P.J.Bergius	Horsetail Paspalum
Paspalum setaceum Michx.	thin paspalum
Passiflora lutea L.	yellow passionflower
Patis racemosa "(Sm.) Romasch.	blackseed ricegrass
Pedicularis canadensis L.	Canadian lousewort
Pedicularis lanceolata Michx.	Swamp Lousewort
Pediomelum argophyllum (Pursh) J. Grimes	silverleaf Indian breadroot
Pediomelum tenuiflorum (Pursh) A.N.Egan	Slimflower Scurfpea
Pellaea atropurpurea (L.) Link	Purple Cliffbrake
Pellaea glabella Mett. ex Kuhn	smooth cliffbrake
Peltandra virginica (L.) Schott	green arrow arum
Penstemon bradburyi Pursh	Large-flowered Beardtongue
Penstemon calycosus Small	Longsepal Beardtongue
Penstemon digitalis Nutt. ex Sims	Foxglove Beardtongue
Penstemon gracilis Nutt.	Lilac Penstemon
Penstemon hirsutus (L.) Willd.	hairy beardtongue
Penstemon pallidus Small	Pale Beardtongue
Penstemon tubaeflorus Nutt.	White Wand Beardtongue
Penthorum sedoides L.	ditch stonecrop
Perideridia americana (Nutt. ex DC.) Rchb.	Eastern Yampah
Persicaria amphibia (L.) Delarbre	Water Knotweed
Persicaria arifolia (L.) Haraldson	Halberdleaf Tearthumb
Persicaria careyi (Olney) Greene	Carey's Smartweed
Persicaria hydropiperoides (Michx.) Small	Swamp Smartweed
Persicaria lapathifolia (L.) Delarbre	Pale Smartweed
Persicaria punctata (Elliott) Small	Dotted Smartweed
Persicaria sagittata (L.) H.Gross	Arrowleaf Tearthumb
Persicaria setacea (Baldwin) Small	Bog Smartweed
Persicaria virginiana L.	Jumpseed
Phacelia bipinnatifida Michx.	Fernleaf Phacelia
Phacelia purshii Buckley	Miami Mist
Phalaris arundinacea L.	Reed Canary Grass
Phegopteris connectilis (Michx.) Watt	long beechfern
Phegopteris hexagonoptera (Michx.) Fée	broad beechfern
Phemeranthus rugospermus (Holz.) Kiger	Prairie Fameflower
Phlox bifida Beck	cleft phlox
Phlox divaricata L.	wild blue phlox
Phlox glaberrima L.	Smooth Phlox
Phlox maculata L.	Wild Sweetwilliam
Phlox pilosa L.	Downy Phlox
Phryma leptostachya L.	American lopseed
Phyla lanceolata (Michx.) Greene	Lanceleaf Fogfruit
Phyllanthus caroliniensis Walter	Carolina leaf-flower
Physalis angulata L.	Cutleaf Groundcherry
Physalis grisea (Waterf.) M. Martínez	Strawberry-Tomato
Physalis heterophylla Nees	Clammy Groundcherry
Physalis longifolia Nutt.	Longleaf Groundcherry
Physalis pubescens L.	Husk Tomato
Physalis pumila Nutt.	Dwarf Groundcherry
Physalis pumila var. hispida (Waterf.) J.R.Sullivan	Prairie Groundcherry
Physalis virginiana Mill.	Virginia groundcherry
Physocarpus opulifolius	Common Ninebark
Physostegia angustifolia Fernald	narrowleaf false dragonhead
Physostegia parviflora Nutt. ex A. Gray	Western False Dragonhead
Physostegia virginiana (L.) Benth.	obedient plant
Phytolacca americana L.	American Pokeweed	✓
Pilea fontana (Lunell) Rydb.	Black-fruited Clearweed
Pilea pumila (L.) A. Gray	Canadian Clearweed
Pinus banksiana Lamb.	Jack Pine
Pinus strobus L.	Eastern White Pine	✓
Planodes virginicum (L.) Greene	Virginia Winged Rockcress
Plantago aristata Michx.	Largebracted Plantain
Plantago cordata Lam.	heartleaf plantain
Plantago pusilla Nutt.	Dwarf Plantain
Plantago rugelii Decne.	Blackseed Plantain
Plantago virginica L.	Virginia Plantain
Platanthera aquilonis Sheviak	northern green orchid
Platanthera blephariglottis (Willd.) Lindl.	white fringed orchid
Platanthera ciliaris (L.) Lindl.	yellow fringed orchid
Platanthera clavellata (Michx.) Luer	small green wood orchid
Platanthera flava (L.) Lindl.	palegreen orchid
Platanthera lacera (Michx.) G. Don	Green Fringed Orchid
Platanthera leucophaea (Nutt.) Lindl.	Prairie White Fringed Orchid
Platanthera orbiculata (Pursh) Lindl.	lesser roundleaved orchid
Platanthera psycodes (L.) Lindl.	Lesser Purple Fringed Orchid
Platanus occidentalis L.	American Sycamore	✓
Pluchea camphorata (L.) DC.	camphor pluchea
Poa chapmaniana Scribn.	Chapman's Bluegrass
Poa paludigena Fernald & Wiegand	bog bluegrass
Poa palustris L.	Fowl Bluegrass
Poa saltuensis Fernald & Wiegand	oldpasture bluegrass
Poa sylvestris A. Gray	woodland bluegrass
Poa wolfii Scribn.	Wolf's bluegrass
Podophyllum peltatum L.	Mayapple	✓
Pogonia ophioglossoides (L.) Ker Gawl.	snakemouth orchid
Polanisia dodecandra (L.) DC.	redwhisker clammyweed
Polanisia jamesii (Torr. & A. Gray) Iltis	James' clammyweed
Polemonium reptans L.	Jacob's Ladder
Polygala cruciata L.	drumheads
Polygala incarnata L.	procession flower
Polygala polygama Walter	racemed milkwort
Polygala sanguinea L.	purple milkwort
Polygala senega L.	Seneca snakeroot
Polygala verticillata L.	whorled milkwort
Polygonatum biflorum (Walter) Elliott	smooth Solomon's seal
Polygonatum pubescens (Willd.) Pursh	hairy Solomon's seal
Polygonum achoreum S.F. Blake	leathery knotweed
Polygonum erectum L.	Erect Knotweed
Polygonum pensylvanicum L.	Pennsylvania Smartweed
Polygonum ramosissimum Michx.	Bushy Knotweed
Polygonum tenue Michx.	pleatleaf knotweed
Polymnia canadensis L.	whiteflower leafcup
Polypodium virginianum L.	rock polypody
Polystichum acrostichoides (Michx.) Schott	Christmas fern
Polytaenia nuttallii DC.	Nuttall's Prairie Parsley
Pontederia cordata L.	Pickerelweed
Populus ×jackii	Balm-of-Gilead
Populus balsamifera L.	Balsam Poplar
Populus deltoides W. Bartram ex Marshall	Eastern Cottonwood
Populus grandidentata Michx.	Large-tooth Aspen
Populus heterophylla L.	Swamp Cottonwood
Populus tremuloides Michx.	Quaking Aspen
Potamogeton amplifolius Tuck.	largeleaf pondweed
Potamogeton bicupulatus Fernald	snailseed pondweed
Potamogeton diversifolius Raf.	waterthread pondweed
Potamogeton foliosus Raf.	Leafy Pondweed
Potamogeton friesii Rupr.	Fries' pondweed
Potamogeton gramineus L.	variableleaf pondweed
Potamogeton natans L.	floating pondweed
Potamogeton nodosus Poir.	longleaf pondweed
Potamogeton praelongus Wulfen	whitestem pondweed
Potamogeton pulcher Tuck.	spotted pondweed
Potamogeton pusillus L.	small pondweed
Potamogeton richardsonii (Benn.) Rydb.	Richardson's pondweed
Potamogeton robbinsii Oakes	Robbins' Pondweed
Potamogeton strictifolius Benn.	narrowleaf pondweed
Potamogeton zosteriformis Fernald	flatstem pondweed
Potentilla norvegica L.	Norwegian cinquefoil
Potentilla simplex Michx.	common cinquefoil
Prenanthes altissima L.	Tall Rattlesnakeroot
Proboscidea louisianica (Mill.) Thell.	Ram's Horn
Proserpinaca palustris L.	marsh mermaidweed
Prunella vulgaris L.	Common Selfheal
Prunus americana Marshall	American Plum
Prunus angustifolia Marshall	Chickasaw plum
Prunus hortulana L.H. Bailey	Hortulan Plum
Prunus mexicana S. Watson	Mexican plum
Prunus munsoniana W. Wight & Hedrick	Wild Goose Plum
Prunus nigra Aiton	Canadian Plum
Prunus pensylvanica L. f.	Pin Cherry
Prunus pumila L.	Sandcherry
Prunus serotina Ehrh.	Black Cherry	✓
Prunus virginiana L.	Chokecherry
Pseudognaphalium obtusifolium (L.) Hilliard & B.L. Burtt	Rabbit-tobacco
Ptelea trifoliata L.	Common Hoptree
Pteridium aquilinum (L.) Kuhn	western brackenfern
Pulsatilla patens (L.) Mill.	eastern pasqueflower
Pycnanthemum tenuifolium Schrad.	narrowleaf mountainmint
Pycnanthemum verticillatum (Michx.) Pers.	whorled mountainmint
Pycnanthemum virginianum (L.) T. Dur. & B.D. Jacks. ex B.L. Rob. & Fernald	Virginia mountainmint
Pyrola americana Sweet	American wintergreen
Pyrola elliptica Nutt.	waxflower shinleaf
Pyrrhopappus carolinianus (Walter) DC.	Carolina desert-chicory
Quercus ×bebbiana	Bebb's Oak
Quercus ×hawkinsiae Sudw.	Hawkins Oak
Quercus alba L.	White Oak	✓
Quercus bicolor Willd.	Swamp White Oak	✓
Quercus coccinea Münchh.	Scarlet Oak	✓
Quercus ellipsoidalis E.J. Hill	Hill's Oak	✓
Quercus imbricaria Michx.	Shingle Oak
Quercus macrocarpa Michx.	Bur Oak	✓
Quercus marilandica Münchh.	Blackjack Oak
Quercus muehlenbergii Engelm.	Chinquapin Oak	✓
Quercus palustris Münchh.	Pin Oak	✓
Quercus rubra L.	Northern Red Oak	✓
Quercus shumardii Buckley	Shumard Oak
Quercus stellata Wangenh.	Post Oak	✓
Quercus velutina Lam.	Black Oak	✓
Ranunculus abortivus L.	Small-Flowered Buttercup
Ranunculus cymbalaria Pursh	Alkali Buttercup
Ranunculus fascicularis Muhl. ex Bigelow	early buttercup
Ranunculus flabellaris Raf.	Yellow Water Buttercup
Ranunculus hispidus Michx.	bristly buttercup
Ranunculus longirostris Godr.	Longbeak Buttercup
Ranunculus micranthus Nutt.	Rock Buttercup
Ranunculus pensylvanicus L. f.	Pennsylvania buttercup
Ranunculus pusillus Poir.	low spearwort
Ranunculus recurvatus Poir.	blisterwort
Ranunculus rhomboideus Goldie	Labrador Buttercup
Ranunculus sceleratus L.	cursed buttercup
Ranunculus trichophyllus Chaix	threadleaf crowfoot
Ratibida pinnata (Vent.) Barnhart	Gray-headed Coneflower
Rhamnus alnifolia L'Hér.	alderleaf buckthorn
Rhamnus lanceolata Pursh	lanceleaf buckthorn
Rhexia virginica L.	handsome Harry
Rhus aromatica Aiton	Fragrant Sumac
Rhus copallinum L.	Winged Sumac
Rhus glabra L.	Smooth Sumac
Rhus typhina L.	Staghorn Sumac	✓
Rhynchospora alba (L.) Vahl	White Beaksedge
Rhynchospora capillacea Torr.	needle beaksedge
Rhynchospora capitellata (Michx.) Vahl	Brownish Beaksedge
Rhynchospora globularis (Chapm.) Small	globe beaksedge
Rhynchospora glomerata (L.) Vahl	clustered beaksedge
Rhynchospora macrostachya Torr. ex A. Gray	tall horned beaksedge
Rhynchospora recognita (Gale) Kral	globe beaksedge
Rhynchospora scirpoides (Torr.) A. Gray	longbeak beaksedge
Ribes americanum Mill.	American Black Currant
Ribes cynosbati L.	eastern prickly gooseberry
Ribes hirtellum Michx.	hairystem gooseberry
Ribes missouriense Nutt.	Missouri Gooseberry
Rorippa aquatica (Eaton) E.J.Palmer & Steyerm.	Lakecress
Rorippa palustris (L.) Besser	bog yellowcress
Rorippa sessiliflora (Nutt.) Hitchc.	stalkless yellowcress
Rorippa sinuata (Nutt.) Hitchc.	spreading yellowcress
Rosa acicularis Lindl.	Prickly Rose
Rosa arkansana Porter	prairie rose
Rosa blanda Aiton	Smooth Rose
Rosa carolina L.	Carolina rose
Rosa palustris Marshall	swamp rose
Rosa setigera Michx.	climbing rose
Rosa virginiana Mill.	Virginia rose
Rotala ramosior (L.) Koehne	lowland rotala
Rubus allegheniensis Porter	Allegheny blackberry
Rubus alumnus L.H. Bailey	oldfield blackberry
Rubus argutus Link	Sawtooth Blackberry
Rubus bellobatus L.H. Bailey	Kittatinny Blackberry
Rubus curtipes L.H. Bailey	shortstalk dewberry
Rubus flagellaris Willd.	Northern Dewberry
Rubus frondosus Bigelow	yankee blackberry
Rubus hispidus L.	Bristly Dewberry
Rubus ithacanus L.H. Bailey	Ithaca blackberry
Rubus meracus L.H. Bailey	dryslope dewberry
Rubus missouricus L.H. Bailey	Missouri Dewberry
Rubus occidentalis L.	Black Raspberry
Rubus odoratus L.	purpleflowering raspberry
Rubus pensilvanicus Poir.	Pennsylvania Blackberry
Rubus plicatifolius Blanch.	plaitleaf dewberry
Rubus pubescens Raf.	dwarf red blackberry
Rubus recurvans Blanch.	recurved blackberry
Rubus rosa L.H. Bailey	rose blackberry
Rubus semisetosus Blanch.	swamp blackberry
Rubus setosus Bigelow	setose blackberry
Rubus steelei L.H. Bailey	Steele's Dewberry
Rubus strigosus Michx.	American Red Raspberry
Rubus wheeleri (L.H. Bailey) L.H. Bailey	Wheeler's blackberry
Rudbeckia fulgida Aiton	Orange Coneflower
Rudbeckia hirta L.	Black-eyed Susan	✓
Rudbeckia laciniata L.	Cutleaf Coneflower	✓
Rudbeckia subtomentosa Pursh	sweet coneflower
Rudbeckia triloba L.	Brown-eyed Susan
Ruellia humilis Nutt.	fringeleaf wild petunia
Ruellia strepens L.	limestone wild petunia
Rumex altissimus Alph. Wood	pale dock
Rumex orbiculatus A. Gray	Greater Water Dock
Rumex verticillatus L.	Swamp Dock
Ruppia cirrhosa (Petagna) Grande	spiral ditchgrass
Sabatia angularis (L.) Pursh	Rosepink
Sabatia campestris Nutt.	Texas star
Sagina decumbens (Elliott) Torr. & A. Gray	trailing pearlwort
Sagittaria brevirostra Mack. & Bush	shortbeak arrowhead
Sagittaria calycina Engelm.	hooded arrowhead
Sagittaria cristata Engelm.	crested arrowhead
Sagittaria cuneata Sheldon	arumleaf arrowhead
Sagittaria graminea Michx.	Grassy Arrowhead
Sagittaria latifolia Willd.	Broadleaf Arrowhead
Sagittaria rigida Pursh	sessilefruit arrowhead
Salix amygdaloides Andersson	peachleaf willow
Salix bebbiana Sarg.	Bebb Willow
Salix candida Flueggé ex Willd.	sageleaf willow
Salix caroliniana Michx.	Coastal Plain Willow
Salix cordata Michx.	Heartleaf Willow
Salix discolor Muhl.	American Pussy Willow
Salix eriocephala Michx.	Missouri River Willow
Salix humilis Marshall	Prairie Willow
Salix interior Rowlee	Sandbar Willow
Salix lucida Muhl.	Shining Willow
Salix myricoides Muhl.	bayberry willow
Salix nigra Marshall	Black Willow
Salix pedicellaris Pursh	bog willow
Salix petiolaris Sm.	meadow willow
Salix sericea Marshall	silky willow
Salix serissima (L.H. Bailey) Fernald	autumn willow
Sambucus racemosa L.	Red Elderberry
Sanguinaria canadensis L.	Bloodroot	✓
Sanguisorba canadensis L.	Canadian burnet
Sanicula canadensis L.	Canadian Blacksnakeroot
Sanicula marilandica L.	Maryland Sanicle
Sanicula odorata (Raf.) K.M. Pryer & L.R. Phillippe	Clustered Blacksnakeroot
Sanicula trifoliata E.P. Bicknell	Largefruit Blacksnakeroot
Sarracenia purpurea L.	purple pitcherplant
Sassafras albidum (Nutt.) Nees	Sassafras	✓
Saururus cernuus L.	Lizard's Tail
Schizachyrium scoparium (Michx.) Nash	Little Bluestem
Schoenoplectiella hallii (A.Gray) Lye	Hall's bulrush
Schoenoplectiella purshiana (Fernald) Lye	Weakstalk Bulrush
Schoenoplectiella smithii (A. Gray) Hayas.	Smith's Bulrush
Schoenoplectus acutus (Muhl. ex Bigelow) Á. Löve & D. Löve	Hardstem Bulrush
Schoenoplectus heterochaetus (Chase) Soják	slender bulrush
Schoenoplectus pungens (Vahl) Palla	common threesquare
Schoenoplectus subterminalis (Torr.) Soják	swaying bulrush
Schoenoplectus tabernaemontani (C.C. Gmel.) Palla	softstem bulrush
Schoenoplectus torreyi (Olney) Palla	Torrey's bulrush
Scirpus atrovirens Willd.	green bulrush
Scirpus cyperinus (L.) Kunth	Woolgrass
Scirpus georgianus Harper	Georgia bulrush
Scirpus hattorianus Makino	mosquito bulrush
Scirpus pedicellatus Fernald	stalked bulrush
Scirpus pendulus Muhl.	Rufous Bulrush
Scleria muehlenbergii Steud.	Muehlenberg's nutrush
Scleria pauciflora Muhl. ex Willd.	Fewflower Nutrush
Scleria reticularis Michx.	netted nutrush
Scleria triglomerata Michx.	whip nutrush
Scleria verticillata Muhl. ex Willd.	low nutrush
Scrophularia lanceolata Pursh	lanceleaf figwort
Scrophularia marilandica L.	carpenter's square
Scutellaria elliptica Muhl. ex Spreng.	hairy skullcap
Scutellaria galericulata L.	marsh skullcap
Scutellaria incana Biehler	Hoary Skullcap
Scutellaria lateriflora L.	blue skullcap
Scutellaria nervosa Pursh	Veiny Skullcap
Scutellaria ovata Hill	heartleaf skullcap
Scutellaria parvula Michx.	Small Skullcap
Sedum ternatum Michx.	Woodland Stonecrop
Selaginella apoda (L.) Spring	meadow spikemoss
Selaginella eclipes W.R. Buck	hidden spikemoss
Selaginella rupestris (L.) Spring	northern selaginella
Senna hebecarpa (Fernald) Irwin & Barneby	American Senna
Senna marilandica (L.) Link	Maryland senna
Setaria parviflora (Poir.) Kerguélen	marsh bristlegrass
Shepherdia canadensis (L.) Nutt.	Russet Buffaloberry
Sicyos angulatus L.	Oneseed Bur Cucumber
Silene antirrhina L.	sleepy silene
Silene nivea (Nutt.) Muhl. ex Otth	Evening Campion
Silene regia Sims	Royal Catchfly
Silene stellata (L.) W.T. Aiton	widowsfrill
Silene virginica L.	Fire Pink
Silphium integrifolium Michx.	wholeleaf rosinweed
Silphium laciniatum L.	compassplant
Silphium perfoliatum L.	Cup Plant
Silphium terebinthinaceum Jacq.	Prairie Rosinweed
Sisyrinchium albidum Raf.	white blue-eyed grass
Sisyrinchium angustifolium Mill.	narrowleaf blue-eyed grass
Sisyrinchium atlanticum E.P. Bicknell	eastern blue-eyed grass
Sisyrinchium campestre E.P. Bicknell	prairie blue-eyed grass
Sisyrinchium montanum Greene	strict blue-eyed grass
Sisyrinchium mucronatum Michx.	needletip blue-eyed grass
Sium suave Walter	hemlock waterparsnip
Smilax illinoensis Mangaly	Illinois greenbrier
Smilax pulverulenta Michx.	Downy Carrionflower
Smilax rotundifolia L.	roundleaf greenbrier
Smilax tamnoides L.	Bristly Greenbrier
Solanum ptycanthum Dunal	West Indian Nightshade
Solidago altissima L.	Tall Goldenrod
Solidago bicolor L.	white goldenrod
Solidago caesia L.	Blue-Stemmed Goldenrod
Solidago canadensis L.	Canada Goldenrod
Solidago flexicaulis L.	Zigzag goldenrod
Solidago gigantea Aiton	Giant Goldenrod
Solidago hispida Muhl. ex Willd.	hairy goldenrod
Solidago juncea Aiton	early goldenrod
Solidago missouriensis Nutt.	Missouri goldenrod
Solidago nemoralis Aiton	gray goldenrod
Solidago patula Muhl. ex Willd.	Roundleaf Goldenrod
Solidago ptarmicoides (Torr. & A.Gray) B.Boivin	Prairie Goldenrod
Solidago rugosa Mill.	Wrinkleleaf Goldenrod
Solidago sciaphila Steele	Shadowy Goldenrod
Solidago simplex Kunth	Mt. Albert goldenrod
Solidago speciosa Nutt.	showy goldenrod
Solidago uliginosa Nutt.	bog goldenrod
Solidago ulmifolia Muhl. ex Willd.	elmleaf goldenrod
Sorbus americana Marshall	American mountain ash
Sorghastrum nutans (L.) Nash	Yellow Indiangrass
Sparganium americanum Nutt.	American bur-reed
Sparganium androcladum (Engelm.) Morong	branched bur-reed
Sparganium emersum Rehmann	European bur-reed
Sparganium eurycarpum Engelm.	broadfruit bur-reed
Spartina pectinata Bosc ex Link	Prairie Cordgrass
Spermacoce glabra Michx.	smooth false buttonweed
Sphenopholis intermedia (Rydb.) Rydb.	slender wedgescale
Sphenopholis nitida (Biehler) Scribn.	shiny wedgescale
Sphenopholis obtusata (Michx.) Scribn.	Prairie Wedgescale
Spiraea alba Du Roi	white meadowsweet
Spiraea tomentosa L.	steeplebush
Spiranthes cernua (L.) Rich.	nodding lady's tresses
Spiranthes lacera (Raf.) Raf.	Northern Slender Lady's Tresses
Spiranthes lucida (H.H. Eaton) Ames	Shining Ladies' Tresses
Spiranthes magnicamporum Sheviak	Great Plains lady's tresses
Spiranthes ovalis Lindl.	October lady's tresses
Spiranthes romanzoffiana Cham.	hooded lady's tresses
Spirodela polyrhiza (L.) Schleid.	Common Duckmeat
Sporobolus clandestinus (Biehler) Hitchc.	rough dropseed
Sporobolus compositus (Poir.) Merr.	Composite Dropseed
Sporobolus cryptandrus (Torr.) A. Gray	sand dropseed
Sporobolus heterolepis (A. Gray) A. Gray	Prairie Dropseed
Sporobolus neglectus Nash	puffsheath dropseed
Sporobolus vaginiflorus (Torr. ex A. Gray) Alph. Wood	poverty dropseed
Stachys aspera Michx.	Hyssopleaf Hedgenettle
Stachys hyssopifolia Michx.	hyssopleaf hedgenettle
Stachys pilosa Nutt.	hairy hedgenettle
Stachys tenuifolia Willd.	smooth hedgenettle
Staphylea trifolia L.	American bladdernut
Stellaria longifolia Muhl. ex Willd.	longleaf starwort
Stellaria pubera Michx.	Star Chickweed
Stenanthium gramineum (Ker Gawl.) Morong	eastern featherbells
Strophostyles helvola (L.) Elliott	amberique-bean
Strophostyles leiosperma (Torr. & A. Gray) Piper	Slickseed Fuzzybean
Stuckenia pectinata (L.) Börner	Sago Pondweed
Stylophorum diphyllum (Michx.) Nutt.	Celandine Poppy	✓
Styrax americanus Lam.	American Snowbell
Sullivantia sullivantii (Torr. & A. Gray) Britton	Sullivant's Coolwort
Symphoricarpos occidentalis Hook.	Western Snowberry
Symphyotrichum boreale (Torr. & A. Gray) Á. Löve & D. Löve	northern bog aster
Symphyotrichum ciliolatum (Lindl.) Á. Löve & D. Löve	Lindley's aster
Symphyotrichum cordifolium (L.) G.L. Nesom	Common Blue Wood Aster
Symphyotrichum drummondii (Lindl.) G.L. Nesom	Drummond's aster
Symphyotrichum dumosum (L.) G.L. Nesom	Rice Button Aster
Symphyotrichum ericoides (L.) G.L. Nesom	White Heath Aster
Symphyotrichum falcatum (Lindl.) G.L. Nesom	white prairie aster
Symphyotrichum laeve (L.) Á. Löve & D. Löve	Smooth Blue Aster
Symphyotrichum lanceolatum (Willd.) G.L. Nesom	White Panicled Aster
Symphyotrichum lateriflorum (L.) Á. Löve & D. Löve	Calico Aster
Symphyotrichum novae-angliae (L.) G.L. Nesom	New England Aster	✓
Symphyotrichum oblongifolium (Nutt.) G.L. Nesom	Aromatic Aster
Symphyotrichum ontarionis (Wiegand) G.L. Nesom	bottomland aster
Symphyotrichum oolentangiense (Riddell) G.L. Nesom	skyblue aster
Symphyotrichum parviceps (Burgess) G.L. Nesom	Smallhead Aster
Symphyotrichum pilosum (Willd.) G.L. Nesom	Hairy White Oldfield Aster
Symphyotrichum praealtum (Poir.) G.L. Nesom	willowleaf aster
Symphyotrichum prenanthoides (Muhl. ex Willd.) G.L. Nesom	crookedstem aster
Symphyotrichum puniceum (L.) Á. Löve & D. Löve	Purplestem aster
Symphyotrichum racemosum (Elliott) G.L. Nesom	Smooth White Oldfield Aster
Symphyotrichum sericeum (Vent.) G.L. Nesom	silky aster
Symphyotrichum shortii (Lindl.) G.L. Nesom	Short's Aster
Symphyotrichum turbinellum (Lindl.) G.L. Nesom	Smooth Violet Prairie Aster
Symphyotrichum urophyllum (Lindl.) G.L. Nesom	White Arrowleaf Aster
Symplocarpus foetidus (L.) Salisb. ex W.P.C. Barton	Skunk Cabbage
Taenidia integerrima (L.) Drude	yellow pimpernel
Taxodium distichum (L.) Rich.	Bald Cypress
Taxus canadensis Marshall	Canada Yew
Tephrosia virginiana (L.) Pers.	Virginia tephrosia
Tetraneuris herbacea Greene	eastern fournerved daisy
Teucrium canadense L.	Canada germander
Thalictrum dasycarpum Fisch. & Avé-Lall.	Purple Meadow-rue

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