Thought I could show you how I do a couple of ideas.
Both involve ruching, I do it by machine so it is easy.
Gather a strip of organza, 3 x 12". Pull threads tightly.
It will become a flower shape.
Add a circle of felt sewn to the back and a center of some sort.
Center ruff, I wrapped a 1" curtain ring with threads. Sewed the center to hold it together. Cut around edge and popped it out.
Add beads or buttons inside the circle.
For the version here I added silk leaves and I cut into the ruffle for petals.