I've heard of the Japonicum Ogurayama D but not Shirasawanum. This will be good to follow. Is it hardy ?
D from my screach online. It's labeled as sieboldianum, shirasawanum, and japonicum. I ask when I bought and she said she think it's a shirasawanum.
Wow D look at all those seeds, someone's going to be busy collecting this Autumn. What a great contrast of colours against the green leaves also.