Rose of Sharon is a common name that applies to several different species of flowering plants that are highly valued throughout the world. The name’s colloquial application has been used as an example of the lack of precision of common names, which potentially causes confusion. Rose of Sharon has also become a frequently used catch phrase in lyrics and verse.
Hibiscus syriacus, a deciduous flowering shrub native to east Asia, the plant generally referred to in American English as “Rose of Sharon” and the national flower of South Korea. The specific epithet indicates that the plant was thought to originate from Syria. The flower’s name in Korean is mugunghwa (Korean Hangul: 무궁화, Hanja: 無窮花) meaning ‘immortality’. – Wikipedia