Ulothrix flacca is a small filamentous marine algae.
This species grows as small tufts of green unbranched filaments growing to no more than 10 cm long forming woolly masses. Cells 14.4 - 32.6μm broad and 4.8-9.6μm [1][2]Ulothrix pseudoflacca and Ulothrix consociata are considered to be forms of Ulothrix flacca by some biologists. Sometimes difficult to distinguish Ulothrix from Urospora.[2]
Common all around the British Isles. Recorded from Scandinavia south to Portugal, in the Mediterranean and the Black Sea. Also all around the world into the Pacific.[2]
It is found on rocks, stones and epiphytically on other algae.[2]
Ulothrix flacca is a small filamentous marine algae.
