Cut-leaved Lavender 
Cyanostegia angustifolia 
Cymbalaria pallida 
Cynoglossum cheirifolium 
Dark mullein 
Dense-flowered mullein 
Derwent Speedwell 
Desert Broomrape 
Desert Indian paintbrush 
Desert pride 
Desert Sage 
Desert-willow 
Digitalis lamarckii 
Dog Figwort 
Dominica sage 
Dorr's Sage 
Doubleclaw 
Downy yellow false foxglove 
Dragon's Head 
Dragonhead mint 
Drug eyebright 
Drymonia coccinea 
Drymonia lanceolata 
Drymonia serrulata