I saw this shrub like plant 8-10' in bloom and in fruit on Oct.22, 2011 at the Arnold Arboretum. there were still many unopened buds yet to open.
The foliage was clean, no evidence of insect or disease. Many seed pods had already dropped their seeds
I gathered a few seeds and I will hopefully have seedlings come spring.
With the weather we had in New England this fall, I'm sure that this plant was in flower up to Thanksgiving.
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