Weed Herbarium – by Scientific Name
| Dactylis glomerata | orchardgrass | Poaceae (Graminae) - Grass Family |
| Datura stramonium | jimsonweed | Solanaceae - Nightshade Family |
| Daucus carota | wild carrot | Apiaceae (Umbelliferae) - Carrot Family |
| Desmodium rotundifolium | prostrate ticktrefoil | Fabaceae (Leguminosae) - Pea or Bean Family |
| Desmodium canadense | hoary tickclover | Fabaceae (Leguminosae) - Pea or Bean Family |
| Dianthus armeria | pink deptford | Caryophyllaceae - Pink Family |
| Dianthus deltoides | pink maiden | Caryophyllaceae - Pink Family |
| 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 |