Danthonia _Danthonia_ 20 Darnel _Lolium temulentum_ 22 Datura _Datura_ 41 Dayflower _Commelina_ 29 Deathcamas _Zygadenus_ 30 Deervetch _Lotus_ 32 Devilsclaw _Proboscidea_ 51 Dewberry _Rubus_ 58 Dianthera _Justicia_ 45 Diaperia _Diaperia_ 41 Dicliptera _Dicliptera_ 41 Ditaxis _Ditaxis_ 41 Dock _Rumex_ 51 Dodder _Cuscuta_ 40 Dogbane _Apocynum_ 36 Dogtail _Cynosurus_ 20 Dogweed _Dyssodia_ 41 Dogwood _Cornus_ 56 Draba _Draba_ 41 Dropseed _Sporobolus_ 25 Ducksmeat _Spirodela_ 30 Duckweed _Lemna_ 29 Dutchmans-breeches _Dicentra cucullaria_ 41 Dutchmanspipe _Aristolochia_ 36 Dwarfdandelion _Krigia_ 45 Echinacea _Echinacea_ 41 Echinocereus _Echinocereus_ 41 Einkorn _Triticum monococcum_ 26 Elderberry _Sambucus_ 59 Elephantsfoot _Elephantopus_ 41 Ellisia _Ellisia_ 41 Elm _Ulmus_ 59 Elodea _Elodea_ 29 Emmer _Triticum dicoccum_ 26 Engelmanndaisy _Engelmannia_ 41 Eriogonum _Eriogonum_ 42 Eryngo _Eryngium_ 42 Erysimum _Erysimum_ 42 Eulophus _Perideridia_ 49 Euonymus _Euonymus_ 56 Eupatorium _Eupatorium_ 42 Euphorbia _Euphorbia_ 42