Do you have anymore of the fabric? I would pick out the large stipple, make another leaf. Sew the two colors of the leaf with a quarter inch seam down the middle, turn the seam to one side, do not press open. Satin stitch down the center. Lay your leaf down on lightweight interfacing face down and sew around the edge to make the same size pattern after sewn....slit the interfacing and turn inside out. Remove the exiting leaf. Place your new leaf on your quilt top. Hand stitch or tack by machine around the edge. Stipple the leaf down. Is there just one leaf or hundreds on the quilt? If so, satin stitch around the edge and down the middle of the ones that are frayed. Best wishes