More than a symbol, Rose of Sharon is for south korean people their national flower. The name comes from "mugung" and means immortality. As a symbol appears on many documents and on the National Emblem of South Korea.
Mugunghwa is mentioned about 1,400 years ago.
Some photos that I've found:
In the Bible, the Rose of Sharon symbolizes beauty.
This plant grows in Asia, including India, Korea and much of China. Is also cultivated in Europe, U.S.A, Latin America, Australia and northern Africa.