''Polysiphonia elongata'' is a small red marine algae in the
Rhodophyta
Red algae, or Rhodophyta (, ; ), are one of the oldest groups of eukaryotic algae. The Rhodophyta also comprises one of the largest phyla of algae, containing over 7,000 currently recognized species with taxonomic revisions ongoing. The majority ...
.
Description
''Polysiphonia elongata'' is a small
red alga
Red algae, or Rhodophyta (, ; ), are one of the oldest groups of eukaryotic algae. The Rhodophyta also comprises one of the largest phyla of algae, containing over 7,000 currently recognized species with taxonomic revisions ongoing. The majority ...
which, unlike some other species of ''
Polysiphonia
''Polysiphonia'' is a genus of filamentous red algae with about 19 species on the coasts of the British Isles and about 200 species worldwide, including Crete in Greece, Antarctica and Greenland. Its members are known by a number of common names. ...
'', does not grow as tufts. It has erect cylindrical main branches and is densely branched growing to a height of 30 cm. The main branches bear lateral branches, each branch consists of a central axes of cells with four