Daffodil:  chivalry ... regard ... unrequited love ... You are the only one ...

Dahlia:  pomp ... gratitude ...

Daisy:  innocence ... loyal love...I'll never tell ... purity ...

Daisy, Gerbera:  friendship ...

Dandelion:  faithfulness ... happiness ... wishes come true ...

Daylily:  flirt ... beauty ...

Delphinium:  heavenly ... sweetness ...

Dill:  irresistible ...

Dogwood:  faithfulness ...

Dusty Miller:  delicacy ...