Prince William, King Charles III Left Personal Notes on Queen Elizabeth II's Funeral Bouquet

All the touching details about the floral arrangement displayed on Her Majesty's coffin during Monday's funeral.

Even the flowers at Queen Elizabeth II's funeral were full of love and historical significance. 

Prince William and King Charles III each left personal notes to Her Majesty atop the wreath on her coffin during Monday's funeral ceremonies. William's card was inscribed with his and Kate Middleton's monograms, while Charles' handwritten note read: "In loving and devoted memory. Charles R."

The "R" in Charles' signature stands for "Rex," the Latin word for "King."

A royal source tells ET that at the king's request, the floral arrangement contained foliage of rosemary, English oak, and myrtle -- cut directly from a plant that was grown from the myrtle that was in the Queen's wedding bouquet during her 1947 wedding to Prince Philip. The wreath also included flowers cut from the gardens of Royal Residences in hues of gold, pink and deep burgundy, with touches of white. 

Rosemary is said to be a symbol of remembrance, while English Oak signifies strength. 

Chris Jackson/Getty Images

During Monday's historical state funeral, Charles appeared to be blinking back tears. He was joined by wife Camilla, the Queen Consort, and his children, Prince William -- with his wife and two eldest children, Prince George and Princess Charlotte -- and Prince Harry with Meghan Markle.

"Over the last ten days, my wife and I have been so deeply touched by the many messages of condolence and support we have received from this country and across the world," the monarch said in a statement on Sunday, the eve of her funeral. "In London, Edinburgh, Hillsborough and Cardiff we were moved beyond measure by everyone who took the trouble to come and pay their respects to the lifelong service of my dear mother, The late Queen."

The King concluded, "As we all prepare to say our last farewell, I wanted simply to take this opportunity to say thank you to all those countless people who have been such a support and comfort to my Family and myself in this time of grief. 

For more on Her Majesty's death, and Queen Elizabeth II's funeralcheck out ET's ongoing coverage.