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Isthmoplea sphaerophora

( BOK:Tvesli)                  4 photos (see below for more photos)


Habit
Photo by: Kjersti Sj√łtun
Location: Flatevossen, Raunefjorden, Hordaland
Verified by Bergen Seaweed Group
Sampling date: 2008-04-04
Published: 2008-12-18

Specimens growing epiphytically on Cladophora rupestris

The species is up to a few cm long and grows in the upper subtidal and lower part of the intertidal. It is often an epiphyte on Cladophora rupestris. In southern Norway it is found during spring, while it may also be found during summer in northern Norway. The thallus is pluriseriate in older parts, otherwise the axes are uniseriate. It has conspicuous main axes with side branches normally opposite or in whorls. Unilocular sporangia often occur together with the whorl branches, or opposite a side branch.




Branching pattern
Photo by: Kjersti Sj√łtun
Location: Flatevossen, Raunefjorden, Hordaland
Photo is showing (categorized): Branching pattern
Verified by Bergen Seaweed Group
Sampling date: 2008-04-04
Published: 2008-12-18

Main axis with side branches, the dark spots are unilocular sporangia




Close-up of branches with unilocular sporangia
Photo by: Kjersti Sj√łtun
Location: Flatevossen, Raunefjorden, Hordaland
Photo is showing (categorized): Unilocular sporangium
Verified by Bergen Seaweed Group
Sampling date: 2008-04-04
Published: 2008-12-18

Unilocular sporangia and initials of unilocular sporangia occur opposite each other or in whorls, or opposite side branches




Pluriseriate part of axis
Photo by: Kjersti Sj√łtun
Location: Flatevossen, Raunefjorden, Hordaland
Photo is showing (categorized): Cells
Verified by Bergen Seaweed Group
Sampling date: 2008-04-04
Published: 2008-12-18

Axis showing both transverse and longitudinal cell divisions



 

     

     

     

     

     

     

     

     

     

     

     

     

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