Antique Quilts

I have a special friend who has an everyday quilt that they have used for picnics and anytime they are sitting outside.  She was told that it was quilted by her Great-Great Grandmother.  She loves to talk to her kids about family but know one knows how old this quilt truly is.  It is worn and loved.  The binding was fraying and so I put a new binding on it so that it will last another 50 years hopefully.  I am wondering if the leaves are fabric from flour sacks or any date anyone could give me.  It would add to the story of this carefully and well loved and used quilt.  Thanks in advance.