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Acrosiphonia arcta

( NYN:Stor grøndott BOK:Stor grønndott)                  3 photos (see below for more photos)


Habit
Photo by: Kjersti Sjøtun
Location: Stora Kalsøy, Austevoll, Hordaland
Photo is showing (categorized): Thallus
Verified by Network members
Sampling date: 2009-04-21
Published: 2010-03-15

Bright green and densely branched thallus

The species is abundant in the littoral zone during spring. Thallus is bright green, uniseriate and densely branched, and may become up to 10-15 cm long. Axes carry descending rhizoids with somewhat less pigmentation. Some branches end in a conspicuous curved or hooked branch. The tips of branches become pointed or spinous as growth ceases. The sporophyte is a unicellular structure (the ‘Codiolum’-stage).




Microscope picture showing branches and rhizoids
Photo by: Kjersti Sjøtun
Location: Stora Kalsøy, Austevoll, Hordaland
Photo is showing (categorized): Branching pattern, Rhizoids
Verified by Network members
Sampling date: 2009-04-21
Published: 2010-03-15

Branches with descending rhizoids (some indicated by arrows)




Detail showing hook branches and spinous branches
Photo by: Kjersti Sjøtun
Location: Stora Kalsøy, Austevoll, Hordaland
Photo is showing (categorized): Apical tip
Verified by Network members
Sampling date: 2010-04-27
Published: 2010-12-02




 

     

     

     

     

     

     

     

     

     

     

     

     

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