After he had been gone a long time the Superior sent another Friar to fetch him, and he found him in his room bathed in a heavenly light facing Our Lady who had two angels with her. Beautiful roses kept issuing from his mouth at each Hail Mary; the angels took them one by one, placing them on Our Lady's head, and she smilingly accepted them.
Finally two other friars who had been sent to find out what happened to the first two saw the same lovely scene, and Our Lady did not go away until the whole Rosary had been said.
So the complete Rosary is a large crown of roses and the Rosary of five decades is a little wreath of flowers or a small crown of heavenly roses which we place on the heads of Jesus and Mary. The rose is the queen of flowers, and so the Rosary is the rose of all devotions and it is therefore the most important one.
from Saint Louis de Montfort's Secret of the Rosary, 25.