| Family |
Taxon |
Common Name | Photographs |
| Cyperaceae |
Scirpus cyperinus (L.) Kunth |
wool-grass |
|
| Cyperaceae |
Scleria triglomerata Michx. |
stone-rush, tall nut-rush, whip nut-rush, whip-grass |
|
| Lamiaceae |
Scutellaria parvula Michx. |
small skullcap |
|
| Lamiaceae |
Scutellaria parvula Michx. var. missouriensis (Torr.) Goodman & C.A.Lawson |
Leonard's skullcap, smooth small skullcap |
|
| Poaceae |
Setaria faberi R.A.W.Herrm. |
Chinese foxtail, giant foxtail, Japanese bristle grass, nodding foxtail |
|
| Poaceae |
Setaria pumila (Poir.) Roem. & Schult. subsp. pumila |
pigeon grass, yellow foxtail |
|
| Poaceae |
Setaria viridis (L.) P.Beauv. |
green bristle grass, green foxtail |
|
| Poaceae |
Setaria viridis (L.) P.Beauv. var. viridis |
green bristle grass, green foxtail |
|
| Caryophyllaceae |
Silene regia Sims |
wild pink, royal catchfly |
|
| Caryophyllaceae |
Silene stellata (L.) W.T.Aiton |
starry campion, widow's-frill |
|
| Asteraceae |
Silphium integrifolium Michx. |
prairie rosinweed, whole-leaf rosinweed |
|
| Asteraceae |
Silphium integrifolium Michx. var. deamii L.M.Perry |
Deam's rosinweed, prairie rosinweed |
|
| Asteraceae |
Silphium integrifolium Michx. X S. perfoliatum L. |
|
|
| Asteraceae |
Silphium laciniatum L. var. laciniatum |
compass-plant |
|
| Iridaceae |
Sisyrinchium albidum Raf. |
common blue-eyed-grass, pale blue-eyed-grass, white blue-eyed-grass |
|
| Apiaceae |
Sium suave Walter |
hemlock water-parsnip, water-parsnip |
|
| Solanaceae |
Solanum carolinense L. var. carolinense |
Carolina horse-nettle, horse-nettle |
|
| Solanaceae |
Solanum dulcamara L. |
bittersweet nightshade, climbing nightshade, deadly nightshade |
|
| Solanaceae |
Solanum ptychanthum Dunal |
eastern black nightshade, West Indian nightshade |
|
| Asteraceae |
Solidago juncea Aiton |
early goldenrod |
|
| Asteraceae |
Solidago missouriensis Nutt. |
Missouri goldenrod |
|
| Asteraceae |
Solidago missouriensis Nutt. var. fasciculata Holz. |
Missouri goldenrod |
|
| Asteraceae |
Solidago nemoralis Aiton |
dyer's-weed goldenrod, gray goldenrod, old-field goldenrod |
|
| Asteraceae |
Solidago nemoralis Aiton subsp. decemflora (DC.) Brammall |
field goldenrod, old-field goldenrod |
|
| Asteraceae |
Solidago nemoralis Aiton subsp. nemoralis |
dyer's-weed goldenrod, field goldenrod, gray goldenrod, old-field goldenrod |
|
| Asteraceae |
Solidago ptarmicoides (Nees) B.Boivin |
prairie goldenrod, upland white goldenrod |
|
| Asteraceae |
Solidago ulmifolia Muhl. ex Willd. var. ulmifolia |
elm-leaved goldenrod |
|
| Asteraceae |
Sonchus asper (L.) Hill |
prickly sow-thistle, spiny sow-thistle |
|
| Poaceae |
Sorghastrum nutans (L.) Nash |
yellow Indian grass |
|
| Sparganiaceae |
Sparganium eurycarpum Engelm. |
broad-fruit bur-reed, common bur-reed, giant bur-reed |
|
| Poaceae |
Spartina pectinata Link |
prairie cord grass, slough grass |
|
| Rosaceae |
Spiraea alba Du Roi var. alba |
white meadowsweet |
|
| Orchidaceae |
Spiranthes magnicamporum Sheviak |
Great Plains lady's-tresses |
|
| Poaceae |
Sporobolus compositus (Poir.) Merr. var. compositus |
meadow drop-seed, rough drop-seed, tall drop-seed |
|
| Poaceae |
Sporobolus heterolepis (A.Gray) A.Gray |
northern drop-seed, prairie drop-seed |
|
| Caryophyllaceae |
Stellaria graminea L. |
common stitchwort, grass-like starwort, starwort |
|
| Asteraceae |
Taraxacum officinale Weber |
common dandelion |
|
| Fabaceae |
Tephrosia virginiana (L.) Pers. |
goat's-rue, rabbit-pea, Virginia tephrosia |
|
| Lamiaceae |
Teucrium canadense L. |
American germander, Canadian germander, wood sage |
|
| Lamiaceae |
Teucrium canadense L. var. virginicum (L.) Eaton |
American germander, Virginia germander, wood sage |
|
| Ranunculaceae |
Thalictrum dasycarpum Fisch. & Avé-Lall. |
purple meadow-rue, tall meadow-rue |
|
| Tiliaceae |
Tilia americana L. var. americana |
American basswood, American linden, basswood |
|
| Apiaceae |
Torilis japonica (Houtt.) DC. |
erect hedge-parsley, Japanese hedge-parsley |
|
| Commelinaceae |
Tradescantia ohiensis Raf. |
blue-jacket, common spiderwort, smooth spiderwort |
|
| Lamiaceae |
Trichostema brachiatum L. |
false-pennyroyal, fluxweed |
|
| Fabaceae |
Trifolium campestre Schreb. |
field clover, low hop clover, pinnate hop clover |
|
| Liliaceae |
Trillium grandiflorum (Michx.) Salisb. |
big white trillium, great white trillium, large-flowered trillium, snow trillium, white trillium, white wake-robin |
|
| Liliaceae |
Trillium recurvatum Beck |
bloody butcher, bloody noses, prairie trillium, red trillium, reflexed trillium, toadshade |
|
| Caprifoliaceae |
Triosteum aurantiacum E.P.Bicknell |
early horse-gentian, orange-fruit horse-gentian |
|
| Caprifoliaceae |
Triosteum perfoliatum L. |
feverwort, late horse-gentian, tinker's-weed, wild-coffee |
|