pipelike

1. The whole develop process of E. prolifera kept polarity, the villi-form protuberances and meshwork structures in the internal cavum of pipelike thallus conduced to the morphological development.

浒苔的发育具有极性，其叶状体管腔内部结构对于藻体的形态发育有作用；

2. Female flowers: calyx pipelike, lobes apically connate with style;