Flowers in autumn

I've been looking and finding pretty flowers and blossoms on my way for a walk with my dog every day.
Most flowers are familiar to me and greeting each time.
Cosmos, Japanese anemone, chrysanthemum and murasakishikibu.
I've found a bunch of blossoms on a tree. They are very elegant and gentle.
I want to know the name of this tree.
Finally I've got to know the name of it.
It's " Hibiscus mutabilis " and " cotton rose mallow " in English name.
It reminds me of a famous novel by Jiro Nitta.  
It means elegant beauty. I think it has patient energy inside different from their lovely sensitive appearance.

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