Weed Herbarium – by Scientific Name
| Dicanthelium clandestinum | deer tongue grass | Poaceae (Graminae) - Grass Family |
| Dichanthelium sphaerocarpon | round-fruited panicgrass | Poaceae (Graminae) - Grass Family |
| Digitaria ischaemum | smooth crabgrass | Poaceae (Graminae) - Grass Family |
| Digitaria sanguinalis | large crabgrass | Poaceae (Graminae) - Grass Family |
| Dipsacus sylvestris | see - Dipsacus fullonum | |
| Dipsacus fullonum | teasel | Dipsacaceae - Teasel Family |
| Draba verna | spring whitlow grass | Brassicaceae (Cruciferae) - Mustard Family |
| Echinochloa crus-galli | barnyardgrass | Poaceae (Graminae) - Grass Family |
| Echinocystis lobata | wild cucumber | Cucurbitaceae - Gourd Family |
| Echium vulgare | blueweed | Boraginaceae - Borage Family |
| Eleusine indica | goose grass | Poaceae (Graminae) - Grass Family |
| Elymus repens | see - Elytrigia repens | |
| Elymus canadensis | Canadian wild rye | Poaceae (Graminae) - Grass Family |
| Elytrigia repens | quackgrass | Poaceae (Graminae) - Grass Family |
| Epilobium glandulosum | see - Epilobium ciliatum | |
| Epilobium angustifolium | fireweed | Onagraceae - Evening Primrose Family |
| Epilobium ciliatum | American willowherb | Onagraceae - Evening Primrose Family |
| Equisetum arvense | field horsetail | Equisetaceae - Horsetail Family |
| Equisetum hyemale | scouring rush | Equisetaceae - Horsetail Family |
| Eragrostis cilianensis | stinkgrass | Poaceae (Graminae) - Grass Family |
| Eragrotis spectabilis | purple lovegrass | Poaceae (Graminae) - Grass Family |
| Erechtites hieraciifolia | pilewort | Asteraceae (Compositae) - Aster or Sunflower Family |
| Erigeron canadensis | see - Conyza canadensis | |
| Erigeron annuus | annual fleabane | Asteraceae (Compositae) - Aster or Sunflower Family |
| Erigeron pulchellus | fleabane | Asteraceae (Compositae) - Aster or Sunflower Family |
| Erodium cicutarium | redstem filaree | Geraniaceae - Geranium Family |
| Erysimum cheiranthoides | wallflower mustard | Brassicaceae (Cruciferae) - Mustard Family |
| Eupatoriadelphus dubius | see - Eupatorium dubium | |
| Eupatoriadelphus maculatus | see - Eupatorium maculatum |
| Eupatorium capillifolium | dogfennel | Asteraceae (Compositae) - Aster or Sunflower Family |
| Eupatorium dubium | eastern Joe-pye weed | Asteraceae (Compositae) - Aster or Sunflower Family |
| Eupatorium fistulosum | hollow-stemmed Joe-pye weed | Asteraceae (Compositae) - Aster or Sunflower Family |
| Eupatorium maculatum | spotted Joe-pye weed | Asteraceae (Compositae) - Aster or Sunflower Family |
| Eupatorium perfoliatum | boneset | Asteraceae (Compositae) - Aster or Sunflower Family |
| Eupatorium purpureum | sweet Joe-pye weed | Asteraceae (Compositae) - Aster or Sunflower Family |
| Eupatorium rugosum | white snakeroot | Asteraceae (Compositae) - Aster or Sunflower Family |
| Euphorbia cyparissias | cypress spurge | Euphorbiaceae - Spurge Family |
| Euphorbia esula | leafy spurge | Euphorbiaceae - Spurge Family |
| Euphorbia maculata | spotted spurge | Euphorbiaceae - Spurge Family |
| Euthamia graminifolia | see - Solidago graminifolia |
| Eutrochium dubium | see - Eupatorium dubium | |
| Eutrochium fistulosum | see - Eupatorium fistulosum | |
| Eutrochium maculatum | see - Eupatorium maculatum | |
| Eutrochium purpureum | see - Eupatorium purpureum |
| Fallopia cilinodis | see - Polygonum cilinode | |
| Fallopia convolvulus | see - Polygonum convolvulus | |
| Fallopia japonica | see - Polygonum cuspidatum | |
| Fallopia sachalinensis | see - Polygonum sachalinense | |
| Fallopia scandens | see - Polygonum scandens |
| Festuca arundinacea | tall fescue | Poaceae (Gramiae) - Grass Family |