Your "Sunflower" is a Jennie Rayment pattern. Love it. I did this as a poinsettia for a Christmas quilt. Jennie's e-mail is:
[email protected] and her website is: www:jennierayment.com. If you are ever lucky enough be be anywhere close to where she is teaching or giving a trunk show - don't miss it. She is a fantastic and funny teacher/speaker.
You don't have much to do to finish your sunflower. You appear to have already tacked the petal close to the center. Next is to go up a little way and fold towards the center the outside part of the petal and tack it down. Then you need to applique the entire flower onto your background, add borders if you choose to, sandwich, quilt, and bind. That's it.