Hibiscus syriacus 'Diana'Rose of Sharon 'Diana'. One of the many species called "Rose of Sharon", a reference to Song of Solomon 2:1. Hibiscus syriacus is the national flower of South Korea. You will see it on the side of police cars, military officer pips and nearly every official seal. Korea is, as well, compared poetically to the flower in the South Korean national anthem. Photographed in a private garden in Berkeley, CA.