I'm no expert at this, in fact, I had to Google the term to make sure that I understood it correctly. So I can now say with confidence that Kusamono is the Japanese craft of displaying, usually small plants in pots to heighten their beauty or reflect a certain season.
I'm probably breaking every rule in Japanese horticultural lore, but I hope these capture some of the spirit of the masters of this discipline.
Sedum and Sempervivum.
Ranunculis ficaria with black and silver markings.