Weed Id guide
ALL

Common NameLatin Name
Saint Johnswort Hypericum perforatum
Saltwort see Russian Thistle
Sandbar Willow Salix exigua
Sassafras Sassafras albidum
Sassy Jack see Caper Spurge
Saw Greenbrier
Sawtooth Blackberry see Highbush Blackberry
Scarlet Indian Paintbrush Castilleja coccinea
Scarlet Pimpernel Anagallis arvensis
Scarlet Toothcup see Valley Redstem
Scotch Thistle Onopordum acanthoides
Scouring Rush see Field Horsetail
Scouringrush Equisetum hyemale
Sensitivebriar see Littleleaf Sensitivebriar
Sericea Lespedeza Lespedeza cuneata
Shagbark Hickory Carya ovata
Sharp-Toothed Blackberry see Highbush Blackberry
Shattercane Sorghum bicolor
Sheep-Foot see Birdsfoot Trefoil
Shepherd's-purse Capsella bursa-pastoris
Shingle Oak Quercus imbricaria
Shoo Fly see Apple-of-Peru
Showy Crotalaria Crotalaria spectabilis
Showy Evening-primrose Oenothera speciosa
Showy Rattlebox see Showy Crotalaria
Showy Ticktrefoil Desmodium canadense
Sicklepod Cassia obtusifolius
Silverleaf Nightshade Solanum elaeagnifolium
Slender Amaranth Amaranthus viridis
Slender Mountain Mint Pycnanthemum tenuifolium
Slender Naiad Najas minor
Slender Pigweed see Slender Amaranth
Slender Pondweed Potamogeton pusillus
Small Pondweed see Slender Pondweed
Smallflower Geranium Geranium molle
Smallflower Morningglory Jacquemontia tamnifolia
Smallflowered Bittercress Cardamine parviflora
Smallflowered Phacelia Phacelia dubia
Smilax bona-nox see Saw Greenbrier
Smooth Bedstraw Galium mollugo
Smooth Bedstraw see Catchweed Bedstraw
Smooth Blackberry see Highbush Blackberry
Smooth Brome Bromus inermis
Smooth Bromegrass see Smooth Brome
Smooth Crabgrass Digitaria ischaemum
Smooth Groundcherry Physalis longifolia var. subglabrata
Smooth Hawksbeard Crepis capillaris
Smooth Pigweed Amaranthus hybridus
Smooth Sumac Rhus glabra
Smooth Vetch Vicia dasycarpa
Snow-on-the-Mountain Euphorbia marginata
Snowy spurge see Snow-on-the-Mountain
Soapwort see Bouncing-bet
Southern Cottonwood see Cottonwood
Southern Sneezeweed see Purple-Headed Sneezeweed
Spanish Needles Bidens bipinnata
Spanish Thistle see Spiny Cocklebur
Spiked loosestrife see Purple Loosestrife
Spiny Amaranth Amaranthus spinosus
Spiny Burweed see Spiny Cocklebur
Spiny Clotbur see Spiny Cocklebur
Spiny Cocklebur Xanthium spinosum
Spiny Pigweed see Spiny Amaranth
Spiny Sowthistle Sonchus asper
Spotted Knapweed Centaurea maculosa
Spotted Spurge Chamaesyce maculata
Spotted St. Johnswort Hypericum punctatum
Spurred Anoda Anoda cristata
Squaw-root Conopholis americana
Squawweed see Cressleaf Groundsel
Star Thistle see Spotted Knapweed
Star-of-Bethlehem Ornithogalum umbellatum
Starch Grapehyacinth Muscari racemosum
Stick-Tights see Devils Beggarticks
Stickweed Verbesina occidentalis
Stinging Nettle Urtica dioica
Stinkgrass Eragrostis cilianensis
Stone Clover see Rabbitfoot Clover
Stonewort see Chara
Straw-colored Flatsedge Cyperus strigosus
Sulfur Cinquefoil Potentilla recta
Summer Spurge see Sun Spurge
Sun Spurge Euphorbia helioscopia
Swamp Milkweed Asclepias incarnata
Swamp Smartweed Polygonum coccineum
Swamp Verbena see Blue Vervain
Sweet Annie see Annual Wormwood
Sweet Betty see Bouncing-bet
Sweet Pea see Perennial Pea
Sweet Vernalgrass Anthoxanthum odoratum
Sweetgum Liquidambar styraciflua
Swine wart cress see Swinecress
Swinecress Coronopus didymus