User blog comment:Doinnuttin/Rose Drawing?/@comment-24.60.103.244-20160607110819

It's the symbol of House Tyrell. It was her way of saying that she is still with the family, even though she's constantly being watched. It was also her way of letting Olenna know that when she's asking her to go home that it's becuase the High Sparrow is coming for her next.