Agardh 1854): Hemitrema, in which the network is composed of a single zone within the thallus margin, and Mesotrema, in which the network consists of one to several zones separated by solid membrane.

 
  • 過(guò)去藻種分類(lèi)上的依據主要以葉片的形態(tài)及生殖構造產(chǎn)生的位置為主。
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