The inner one of these branches is gradually separated from the outer one and moves towards the central axile, and finally fades away just when the style appears.

• 3枚隔膜束中远轴面的两束各进入一枚内轮雄蕊，而近轴面的一枚于延长部中上部产生分支，其中内方的分支逐渐远离近轴面向中央靠近，至延长部顶部于远轴面萼片及花柱刚形成时消失；