This is a simple purple floret origami paper flower. When you combine a couple dozen of these, and arrange them in a sphere, you’ll get a hydrangea!
“Origami Flowers: Popular Blossoms and Creative Bouquets” written by Hiromi Hayashi.
The folding diagrams for this floret is fairly easy to follow.
I make these with 6″ stems of floral wire and floral tape. The little florets are roughly the same size as the little individual flowers of a large hydrangea ball.