All branches more than one cell wide, tapering to the tips, which are often distinctively curled.
Structured as branching flat leaves or blades.
Many small cells compressed into branching tubes; young branches may be one cell wide.
![[Bostrychia], Waipori River, X6. Photo: Otago Regional Council & Manaaki Whenua](/assets/Tools-And-Resources/Identification/algae/bostrychia6__FillMaxWzMwMCwyMDBd.jpg)
![[Calaglossa], lower Taieri River, X6. Photo: Otago Regional Council & Manaaki Whenua](/assets/Tools-And-Resources/Identification/algae/calaglossa6__FillMaxWzMwMCwyMDBd.jpg)
![[Compsopogon] bloom, Herekawe Stream, X200. Photo: Taranaki Regional Council](/assets/Tools-And-Resources/Identification/algae/compsopogon200__FillMaxWzMwMCwyMDBd.jpg)