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Fucus spiralis

( BOK:Kaurtang,Spiraltang ENG:Spiralled Wrack)                  4 photos (see below for more photos)


Specimens growing on large stones on the upper shore during low tide.
Photo by: Vivian Husa
Location: Fyrsundet, Fedje, Hordaland
Photo is showing (categorized): Thallus
Verified by Network members
Sampling date: 2009-07-16
Published: 2010-03-10


The species is tolerant to dry conditions during low tide and grows usually on hard rock in a zone between Fucus vesiculosus and Pelvetia canaliculata. The fronds can be up to 30-40 cm tall and has a prominent midrib but no air-vesicles. The fronds show an irregular dichotomous branching-pattern and are often spirally twisted.




Specimens with receptacles
Photo by: Vivian Husa
Location: Fyrsundet, Fedje, Hordaland
Photo is showing (categorized): Reproductive structure
Verified by Network members
Sampling date: 2009-07-16
Published: 2010-03-10


The species carries rounded receptacles, often in pairs, with a characteristic rim along the egde.




Specimen with immature receptacles
Photo by: Vivian Husa
Location: Solesnes, Hardangerfjorden, Hordaland
Photo is showing (categorized): Reproductive structure
Verified by Network members
Sampling date: 2009-06-09
Published: 2010-03-10





Habit of a small forn
Photo by: Kjersti Sjøtun
Location: Gulo, Bømlo, Hordaland
Photo is showing (categorized): Thallus, Reproductive structure
Sampling date: 2017-08-08
Published: 2020-06-17

A small morphotype (Fucus spiralis forma nanus) occurring in wave-exposed intertidals



 

     

     

     

     

     

     

     

     

     

     

     

     

    Latest published photos


    Gelidium pusillum
    Sampling date 2014-10-08
    Published 2020-07-06

     


    Fucus spiralis
    Sampling date 2017-08-08
    Published 2020-06-17

     


    Pyropia leucosticta
    Sampling date 2020-06-17
    Published 2020-06-17

     


    Pyropia leucosticta
    Sampling date 2008-06-01
    Published 2020-06-17

     


    Pyropia leucosticta
    Sampling date 2008-06-01
    Published 2020-06-17