Piercing
AIFD: piercing · UK trade: stitching, or piercing
The default for anything with a firm green calyx holding the petals: roses, carnations, mums, dahlias. A single wire goes horizontally through the calyx, the two legs bend down against the stem, and one wraps the other. The head now pivots on the wire instead of on its own neck, which is the part that snaps.