This is a double flower purple Rose of Sharon. I photographed this during a visit to the Seen Hock Yeen Chinese temple in Chemor, Perak.
“Hibiscus syriacus - Rose of Sharon Single and Double Flowers”, a copyrighted post, was written for My Nice Garden blog by Autumn Belle @ http://www.mynicegarden.com/ on Aug 12th, 2011.
This single flower purple Rose of Sharon was photographed at the rooftop Secret Garden of 1-Utama.
Native plant of: East Asia
It is the National Flower of South Korea
Korean name : mugunghwa (Hangul: 무궁화; Hanja: 無窮花).
The flower's symbolic significance stems from the Korean word mugung, which means "immortality".*
*Source: Wikipedia, link is here.