This form of the species,
sieboldii, comes directly from its native
9 inch high mound spreads to 22 inches in width. It produces
medium purple flowers in early August.
Similar cultivars include H. 'Humor' and H. 'Saishu Jima'.
This plant may have been sold as 'Mackwoods No.
34'. It is also known as H. sieboldii 'Viridis' or just 'Viridis'.