Dahurian Buckthorn          

Daisy          

Dakota Gentian          

Dalmatian Toadflax          

Dames Rocket      

Dandelion          

Darkthroat Shootingstar      

Darnel Ryegrass          

Dayflower          

Deadly Nightshade          

Deadnettle          

Deathcamas          

Deer Sedge          

Desert Biscuitroot          

Desert Goosefoot          

Desert Madwort          

Desert Princesplume          

Desert Ragwort          

Desert Wheatgrass      

Desert Wirelettuce          

Desert-thorn          

Desertparsley          

Dewey Sedge      

Dill          

Dioecious Sedge          

Disc Mayweed          

Disk Waterhyssop      

Distaff Thistle          

Ditch Stonecrop      

Diverseglume Wildrye          

Dock          

Dodder          

Dogbane          

Dogmustard          

Dogwood          

Dooryard Dock          

Dotted Blazing Star      

Dotted Smartweed      

Double Twinpod          

Downy Arrowwood      

Downy Gentian          

Downy Hawthorn          

Downy Paintedcup      

Downy Phlox