Linda, that stamp set was always listed in the Duo sets when it was for sale. The few entries that are in the gallery tag Gina as the illustrator. The current Duo stamp sets in the store are listed under Gina when looking at specific illustrators. I would list anything posted with that stamp with Gina's name. Does this help?
Looks like something Melanie Muenchinger would create. She has done all the Year of Flowers stamps and this looks very similar. You might ask Melanie.
It is a stamp set duo like lovinpaper said, the name is "If I Had A Flower" it is by Gina. Have a good day! :) <3
Thanks Ladies ... I made card with image I had in my stash for challenge and illustrations when I posted the card thanks Linda