title: Ceramium virgatum
text: # Ceramium virgatum
  
  Ceramium virgatum, or the red hornweed, is a small red marine alga.
  
  ## Description
  
  This small alga grows erect with cylindrical filamentous axes. It is repeatedly branched, corticate and grow to 30 cm long. Very difficult to identify from some other species.
  
  ## Habitat
  
  Common in rock pools and in the upper sub-littoral in a wide range of habitats.
  
  ## Distribution
  
  Widely distributed around the British Isles including the Isle of Man and the Shetland Islands.
  
  ## Nomenclature
  
  The non-spiny species of Ceramium are in taxonomic chaos and there is confusion concerning this species which is referred to as Ceramium nodulosum in some references.
  
  