Appearance
''Chaetomorpha linum'' is a species composed of fine hair-like, uniseriate, unbranched filaments. Cells 1 - 2 times as long as broad, maximum width 585μm. Cells cylindrical or barrel-shaped. Both unattached and attached forms exist. The unattached plants form masses of twisted filaments the attached filament grow as tufts from a definite base.Distribution
Both ''C. linum'' and ''C. aerea'' are found around the British Isles and around Europe into the Mediterranean. In North America it is to be found along the Atlantic coast and in California.Habitat
In Ireland found in fresh water. Both attached and unattached forms are to be found in marine waters.References:
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