Thorns of the Little Rose is the actual translation of Sleeping Beauty's German name of "Dornroeschen", (The s and ch are pronounced separately, not like in Hershey's chocolates, for ex.) as told by the Grimm Brothers of Germany. They derived the story from a tale by Giambattista Basile, an Italian who in 1634 published a book, "The Tale of Tales," which contained a story titled "Sun, Moon and Talia" .
The Grimm Brother story starts with the birth of Dornroeschen, which called for a huge celebration. While all the good fairies of the kingdom were invited, the bad fairies were not. One of them took her revenge by putting a curse on D., predicting when she was 15 she wood prick her finger on a spindle and die. One of the good fairies managed to soften the death threat to a 100-year sleep. Although the king immediately removed all spinning wheels from the castle, he forgot the one in the tower's attic. It is where D. stumbled on it and pricked her finger.
The scene depicted in the design indicates the roses around the castle as they invaded the inside during Dornroeschen's and the court's 100-year sleep.
The depiction of Dornroeschen shows her just before she pricks her finger on the spindle.
The entire story is found online, in English under "Sleeping Beauty", and in German under "Dornroeschen".