Common Weed Names: S

Common Name Scientific Name
Salsify, Western Tragopogon dubius
Sandbur, Longspine Cenchrus longispinus
Scarlet Pimpernel Anagallis arvensis
Sericea Lespedeza Lespedeza cuneata
Shepherd's-purse Capsella bursa-pastoris
Showy Crotalaria Crotalaria spectabilis
Sicklepod Cassia obtusifolius
Signalgrass, Broadleaf Brachiaria platyphylla
Silverleaf Nightshade Solanum eleagnifolium
Slender Naiad Najas minor
Slender Pondweed Potamogeton pusillus
Smallflower Morningglory Jacquemontia tamnifolia
Small-flowered Crowfoot Ranunculus abortivus
Smartweed, Pennsylvania Polygonum pensylvanicum
Smartweed, Swamp Polygonum coccineum
Smooth Bedstraw Galium mollugo
Smooth Crabgrass Digitaria ischaemum
Smooth Hawksbeard Crepis capillaris
Smooth Pigweed Amaranthus hybridus
Smooth Vetch Vicia dasycarpa
Soapwort Saponaria officinalis
Sowthistle, Annual Sonchus oleraceus
Sowthistle, Spiny Sonchus asper
Spanishneedles Bidens bipinnata
Speedwell, American Veronica americana
Speedwell, Persian Veronica persica
Spiderwort, Asian Murdannia keisak
Spiny Amaranth Amaranthus spinosus
Spiny Cocklebur Xanthium spinosum
Spiny Sowthistle Sonchus asper
Spotted Knapweed Centaurea maculosa
Spotted Spurge Euphorbia maculata
Spurge, Caper Euphorbia lathyris
Spurge, Cypress Euphorbia cyparissias
Spurge, Spotted Euphobia maculata
Spurge, Sun Euphorbia helioscopia
Spurge, Toothed Euphorbia dentata
Spurred Anoda Anoda cristata
Spurry, Corn Spergula arvensis
Starch Grapehyacinth Muscari racemosum
Star-of-Bethlehem Ornithogalum umbellatum
Star Thistle Centaurea maculosa
Starwort, Water Callitriche heterophylla
Stick-tights Bidens frondosa
Stickweed Verbesina occidentalis
Stinging Nettle Urtica dioica
Stinkgrass Eragrostris cilianensis
St. Johnswort Hypericum perforatum
Stonewort Chara spp.
Sulfur Cinquefoil Potentilla recta
Sun Spurge Euphorbia helioscopia
Swamp Milkweed Aslepias incarnata
Swamp Smartweed Polygonum coccineum
Sweet Pea Lathyrus latifolius
Sweet Vernalgrass Anthoxanthum odoratum