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Polysiphonia elongata

( NO:Stilkdokke)                  3 photos (see below for more photos)


Habit
Photo by: Kjersti Sj√łtun
Location: Raunefjorden, Hordaland
Verified by Kjersti Sj√łtun
Sampling date: 2011-04-13
Published: 2014-01-17

Around 20 cm long thallus

The species is relatively common in the subtidal. The thallus has a coarse basal part and is set with thinner and straight side branches towards the top. The side branches form with a relatively narrow angel towards the main axes. During summer the side branches are often shed, leaving only the coarse basal parts. The central cell forms segments with four periaxial cells. The axes are covered with elongated cortex cells, except for the outer ends of the branches which lack cortex cells.




Cortex cells
Photo by: Kjersti Sj√łtun
Location: Raunefjorden, Hordaland
Photo is showing (categorized): Cortical cells
Verified by Kjersti Sj√łtun
Sampling date: 2011-04-13
Published: 2014-01-17

Main axis with elongated cortex cells covering the segments




Branches
Photo by: Kjersti Sj√łtun
Location: Raunefjorden, Hordaland
Photo is showing (categorized): Periaxial cells
Sampling date: 2011-04-13
Published: 2014-01-17

Branch ends without cortex cells and with two of the four periaxial cells clearly visible. Side branches are strongly constricted towards the base



 

     

     

     

     

     

     

     

     

     

     

     

     

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