UMass Extension Weed Herbarium

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Common Name Scientific Name Family Name
salsify, yellow Tragopogon dubius Asteraceae (Compositae) - Aster or Sunflower Family
sandbur, longspine Cenchrus longispinus Poaceae (Graminae) - Grass Family
sandspurry, red Spergularia rubra Caryophyllaceae - Pink Family
sandwort, thymeleaf Arenaria serpyllifolia Caryophyllaceae - Pink Family
scouring rush Equisetum hyemale Equisetaceae - Horsetail Family
selfheal see - heal-all
shepherd's-purse Capsella bursa-pastoris Brassicaceae (Cruciferae) - Mustard Family
showy tick-trefoil see - tickclover, hoary
silvergrass, amur Miscanthus sacchariflorus Poaceae (Graminae) - Grass Family
skunk cabbage, common Symplocarpus foetidus Araceae - Arum Family
smartweed, hedge Polygonum scandens Polygonaceae - Smartweed or Buckwheat Family
smartweed, lady's thumb Polygonum persicaria Polygonaceae - Smartweed or Buckwheat Family
smartweed, Pennsylvania Polygonum pensylvanicum Polygonaceae - Smartweed or Buckwheat Family
snakeroot, white Eupatorium rugosum Asteraceae (Compositae) - Aster or Sunflower Family
snapdragon, wild see - toadflax, old field
soapwort see - bouncing bet
sorrel, field see - sorrel, red
sorrel, red Rumex acetosella Polygonaceae - Smartweed or Buckwheat Family
sorrel , sheep see - sorrel, red
sourgrass see - woodsorrel, yellow
sourgrass see - sorrel, red
sourgrass see - woodsorrel, creeping
sowthistle, annual Sonchus oleraceus Asteraceae (Compositae) - Aster or Sunflower Family
sowthistle, common see - sowthistle, annual
sowthistle, creeping see - sowthistle, perennial
sowthistle, field see - sowthistle, perennial
sowthistle, perennial Sonchus arvensis Asteraceae (Compositae) - Aster or Sunflower Family
sowthistle, spiny Sonchus asper Asteraceae (Compositae) - Aster or Sunflower Family
sowthistle, spiny-leaved see - sowthistle, spiny
speargrass see - bluegrass, annual
speedwell, common Veronica officinalis Scrophulariaceae - Figwort Family
speedwell, corn Veronica arvensis Scrophulariaceae - Figwort Family
speedwell, ivy leaf Veronica hederifolia Scrophulariaceae - Figwort Family
speedwell, purslane Veronica peregrina Scrophulariaceae - Figwort Family
speedwell, thymeleaf Veronica serpyllifolia Scrophulariaceae - Figwort Family
spring beauty, narrowleaf Claytonia virginica Portulacaceae - Purslane Family
spurge, cypress Euphorbia cyparissias Euphorbiaceae - Spurge Family
spurge, Hungarian see - spurge, leafy
spurge, leafy Euphorbia esula Euphorbiaceae - Spurge Family
spurge, prostrate see - spurge, spotted
spurge, spotted Euphorbia maculata Euphorbiaceae - Spurge Family
St. Johnswort Hypericum perforatum Hyperiacaceae - St. Johnswort Family
staghorn see - sumac, staghorn
star-of-Bethlehem Ornithogalum umbellatum Liliaceae - Lily Family
starweed see - chickweed, common
sticklewort see - agrimony
stickseed, Virginia see - beggarslice
sticktight see - beggarticks
stickwort see - agrimony
stickywilly see - bedstraw, catchweed

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