| Family |
Taxon |
Common Name | Photographs |
| Salicaceae |
Salix exigua Nutt. subsp. interior (Rowlee) Cronquist |
sandbar willow |
|
| Salicaceae |
Salix nigra Marshall |
black willow |
|
| Caprifoliaceae |
Sambucus canadensis L. var. canadensis |
American elder, elderberry |
|
| Primulaceae |
Samolus valerandi L. subsp. parviflorus (Raf.) Hultén |
seaside brookweed, water pimpernel |
|
| Cyperaceae |
Scirpus pendulus Muhl. |
rufous bulrush |
|
| Scrophulariaceae |
Scrophularia marilandica L. |
carpenter's-square, eastern figwort, late figwort |
|
| Lamiaceae |
Scutellaria lateriflora L. |
blue skullcap, mad-dog skullcap |
|
| Poaceae |
Secale cereale L. |
rye |
|
| Poaceae |
Setaria pumila (Poir.) Roem. & Schult. subsp. pumila |
pigeon grass, yellow foxtail |
|
| Poaceae |
Setaria viridis (L.) P.Beauv. |
green bristle grass, green foxtail |
|
| Caryophyllaceae |
Silene latifolia Poir. |
bladder campion, white campion, white cockle |
|
| Caryophyllaceae |
Silene stellata (L.) W.T.Aiton |
starry campion, widow's-frill |
|
| Brassicaceae |
Sinapis arvensis L. |
California rape, charlock mustard |
|
| Brassicaceae |
Sisymbrium altissimum L. |
tall tumble mustard |
|
| Solanaceae |
Solanum carolinense L. var. carolinense |
Carolina horse-nettle, horse-nettle |
|
| Solanaceae |
Solanum dulcamara L. |
bittersweet nightshade, climbing nightshade, deadly nightshade |
|
| Asteraceae |
Solidago caesia L. |
axillary goldenrod, blue-stemmed goldenrod, wreath goldenrod |
|
| Asteraceae |
Solidago canadensis L. |
Canadian goldenrod, common goldenrod |
|
| Asteraceae |
Solidago canadensis L. var. scabra Torr. & A.Gray |
Canadian goldenrod, common goldenrod, tall goldenrod |
|
| Asteraceae |
Solidago gigantea Aiton |
giant goldenrod, late goldenrod, smooth goldenrod |
|
| Asteraceae |
Solidago juncea Aiton |
early goldenrod |
|
| Asteraceae |
Solidago riddellii Frank ex Riddell |
Riddell's goldenrod |
|
| Asteraceae |
Solidago rigida L. |
rigid goldenrod, stiff goldenrod |
|
| Asteraceae |
Sonchus arvensis L. |
field sow-thistle, perennial sow-thistle |
|
| Asteraceae |
Sonchus arvensis L. var. glabrescens Günther, Grab. & Wimm. |
marsh sow-thistle |
|
| Asteraceae |
Sonchus asper (L.) Hill |
prickly sow-thistle, spiny sow-thistle |
|
| Rosaceae |
Sorbus aucuparia L. |
Eurasian mountain-ash, European mountain-ash, rowan |
|
| Poaceae |
Sorghastrum nutans (L.) Nash |
yellow Indian grass |
|
| Lamiaceae |
Stachys palustris L. |
hedge-nettle, marsh hedge-nettle, woundwort |
|
| Lamiaceae |
Stachys tenuifolia Willd. var. tenuifolia |
narrow-leaved hedge-nettle, smooth hedge-nettle |
|
| Caprifoliaceae |
Symphoricarpos albus (L.) S.F.Blake |
snowberry |
|
| Caprifoliaceae |
Symphoricarpos albus (L.) S.F.Blake var. albus |
snowberry |
|
| Caprifoliaceae |
Symphoricarpos albus (L.) S.F.Blake var. laevigatus S.F.Blake |
western snowberry |
|
| Caprifoliaceae |
Symphoricarpos occidentalis Hook. |
western snowberry, wolfberry |
|
| Araceae |
Symplocarpus foetidus (L.) Salisb. ex W.P.C.Barton |
skunk-cabbage |
|
| Apiaceae |
Taenidia integerrima (L.) Drude |
yellow-pimpernel |
|
| Asteraceae |
Taraxacum officinale Weber |
common dandelion |
|
| Ranunculaceae |
Thalictrum dioicum L. |
early meadow-rue, quicksilver-weed |
|
| Tiliaceae |
Tilia americana L. var. americana |
American basswood, American linden, basswood |
|
| Commelinaceae |
Tradescantia ohiensis Raf. |
blue-jacket, common spiderwort, smooth spiderwort |
|
| Asteraceae |
Tragopogon dubius Scop. |
fistulous goat's-beard, greater sand goat's-beard, yellow salsify |
|
| Asteraceae |
Tragopogon porrifolius L. |
oyster-plant, salsify, vegetable-oyster |
|
| Fabaceae |
Trifolium dubium Sibth. |
little hop clover, suckling clover |
|
| Fabaceae |
Trifolium pratense L. |
red clover |
|
| Liliaceae |
Trillium flexipes Raf. |
bent trillium, declined trillium, nodding wake-robin |
|
| Liliaceae |
Trillium recurvatum Beck |
bloody butcher, bloody noses, prairie trillium, red trillium, reflexed trillium, toadshade |
|
| Caprifoliaceae |
Triosteum perfoliatum L. |
feverwort, late horse-gentian, tinker's-weed, wild-coffee |
|
| Typhaceae |
Typha angustifolia L. |
narrow-leaved cat-tail |
|
| Scrophulariaceae |
Verbascum blattaria L. |
moth mullein |
|
| Scrophulariaceae |
Verbascum thapsus L. |
common mullein, flannel plant, giant mullein |
|