It looks to me like they are not any specific one.
I suggest using a scalloped-edge round cutter and lightly ruffling the edge, then drying them in a small cup like a shot glass. If you have any gumpaste flower drying things you probably could find something. After they are dry, stack 2 together and use either stamen or dragees for the center.
Check out the Wilton Fantasy Flower. These may be made with a 5 petal cutter, ruffled and thinned edges with a ball tool, then stacked with tissue between the petals to dry. HTH and Best Wishes!
Here is the directions for fantasy flower they use a heart shape cutter
http://www.wilton.com/technique/Fantasy-Gumpaste-Flowers
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