Edited to Add: I made these flowers in the same way that log cabin blocks are made. I randomly cut a center shape and then added strips one at time on each edge going around. If there's interest, I'll be happy to do a tutorial about it.
They're raw edge appliqued on with Steam-A-Steam Lite (a lightweight fusible web). I ironed them on (following the Seam-A-Steam instructions) and straight-stitched around the edges.