Traditional Kusudama by Makoto Yamaguchi
Number of units: 60 — each flower has 5 units.
Designer: Makoto Yamaguchi
In the book Kusudama: Ball Origami (76 pages, 1990) by Makoto Yamaguchi. Instructions for a similar-looking model are available here (free). Both are traditional Japanese designs, frequently found hanging in Japanese homes — among the few Kusudama models that requires glue. Almost all modern "modular origami" models are glue-free.