UMass Extension Weed Herbarium

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Common Name Scientific Name Family Name
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
stiltgrass, Japanese Microstegium vimineum Poaceae (Graminae) - Grass Family
stinkgrass Eragrostis cilianensis Poaceae (Graminae) - Grass Family
stinkhorn see - jimsonweed
stinking Willie see - ragwort, tansy
stinkweed see - jimsonweed
stitchwort see - little starwort
stoneroot see - horsebalm
storksbill see - filaree, redstem
strawberry, wild Fragaria virginiana Rosaceae - Rose Family
succory see - chicory
sumac, smooth Rhus glabra Anacardiaceae - Cashew Family
sumac, staghorn Rhus typhina Anacardiaceae - Cashew Family
swallowwort, black Cynanchum nigrum Asclepiadaceae - Milkweed Family
swallowwort, pale Cynanchum rossicum Asclepiadaceae - Milkweed Family
sweet clover, white Melilotus alba Fabaceae (Leguminosae) - Pea or Bean Family
sweet clover, yellow Melilotus officinalis Fabaceae (Leguminosae) - Pea or Bean Family
sweet jarvil see - cicely, sweet
sweet pea see - peavine, everlasting
switchgrass Panicum virgatum Poaceae (Graminae) - Grass Family
tansy Tanacetum vulgare Asteraceae (Compositae) - Aster or Sunflower Family
tear-thumb, arrowleaf Polygonum sagittatum Polygonaceae - Smartweed or Buckwheat Family
tearthumb, Halberd-leaved Polygonum arifolium Polygonaceae - Smartweed or Buckwheat Family
teasel Dipsacus fullonum Dipsacaceae - Teasel Family
thimbleberry see - raspberry, purple-flowering
thistle, bull Cirsium vulgare Asteraceae (Compositae) - Aster or Sunflower Family
thistle, Canada Cirsium arvense Asteraceae (Compositae) - Aster or Sunflower Family
thistle, creeping see - thistle, Canada
thorn apple see - jimsonweed
thoroughwort see - boneset
thousandleaf see - yarrow
three-seeded mercury see - copper-leaf, rhombic
tickclover, hoary Desmodium canadense Fabaceae (Leguminosae) - Pea or Bean Family
ticktrefoil, prostrate Desmodium rotundifolium Fabaceae (Leguminosae) - Pea or Bean Family
ticktrefoil, round-leaved see - ticktrefoil, prostrate
timothy Phleum pratense Poaceae (Graminae) - Grass Family
toadflax, annual see - toadflax, old field
toadflax, blue see - toadflax, old field
toadflax, Canada see - toadflax, old field
toadflax, old field Linaria canadensis Scrophulariaceae - Figwort Family

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