Manihot hibiscus is also known as sunset hibiscus becuase of its color. It blossoms in autumn. It really should not be confused with yellow hibiscus because the leaves are completely different.
I have learned not to described the anatomy of each flower too much. There are so many variations. In Yangzhou's Bamboo Garden, every student was busy showing me bamboo varieties with features I told them never to do in painting. They had a ball.