Index of plants by genus
| Species | Common Name | Family |
| Dalea candida | White Prairie Clover | Fabaceae |
| Dalea purpurea | Purple Prairie Clover | Fabaceae |
| Dalibarda repens | False Violet | Rosaceae |
| Danthonia compressa | Flattened Oatgrass | Poaceae |
| Danthonia spicata | Poverty Oatgrass | Poaceae |
| Decodon verticillatus | Swamp Loosestrife | Lythraceae |
| Dendrolycopodium dendroideum | Prickly Tree Clubmoss | Lycopodiaceae |
| Dendrolycopodium hickeyi | Hickey's Tree Clubmoss | Lycopodiaceae |
| Dendrolycopodium obscurum | Flat-branches Tree Clubmoss | Lycopodiaceae |
| Dennstaedtia punctilobula | Hay-scented Fern | Dennstaedtiaceae |
| Deparia acrostichoides | Silvery Glade Fern | Dryopteridaceae |
| Desmodium canadense | Showy Tick-trefoil | Fabaceae |
| Desmodium glutinosum | Pointed Tick-trefoil | Fabaceae |
| Dicentra canadensis | Squirrel Corn | Fumariaceae |
| Dicentra cucullaria | Dutchman's Breeches | Fumariaceae |
| Dichanthelium oligosanthes | Few-flowered Panic grass | Poceeae |
| Dichanthelium villosissimum | White-haired Panic Grass | Poaceae |
| Dicranum polysetum | Wavy Broom Moss | Dicranaceae |
| Diervilla lonicera | Dwarf Shrub Honeysuckle | Caprifoliaceae |
| Diospyros virginiana | American Persimmon | Ebenaceae |
| Diphasiastrum complanatum | Northern Ground Cedar | Lycopodiaceae |
| Diphasiastrum digitatum | Southern Ground Cedar | Lycopodiaceae |
| Diphasiastrum tristachyum | Blue Ground Cedar | Lycopodiaceae |
| Diphyscium foliosum | Powder Gun Moss | Buxbaumiaceae |
| Diplazium pycnocarpon | Glade Fern | Dryopteridaceae |
| Dodecatheon meadia | Shooting Star | Primulaceae |
| Drosera filiformis | Thread-leaved Sundew | Droseraceae |
| Drosera intermedia | Narrow-leaved Sundew | Droseraceae |
| Drosera rotundifolia | Round-leaved Sundew | Droseraceae |
| Dryopteris campyloptera | Mountain Woodfern | Dryopteridaceae |
| Dryopteris carthusiana | Spinulose Woodfern | Dryopteridaceae |
| Dryopteris clintoniana | Clinton's Woodfern | Dryopteridaceae |
| Dryopteris cristata | Crested Woodfern | Dryopteridaceae |
| Dryopteris goldiana | Goldie Fern | Dryopteridaceae |
| Dryopteris intermedia | Intermediate Woodfern | Dryopteridaceae |
| Dryopteris marginalis | Marginal Woodfern | Dryopteridaceae |
| Dulichium arundinaceum | Dwarf Bamboo | Cyperaceae |
© 2004-2009 Michael Hough