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    <title>DigitalNatura.Org - Umbilicaria freyi (=Umbilicaria hirsuta)</title>
    <link>http://digitalnatura.org/details.php?image_id=5137</link>
    <description><![CDATA[Picture taken close to Santa Fe del Montseny, Barcelona, in a vertical watered rock surface, 1.000 m. altitude.

This lichen is not frequent in Catalonia and it is only mentioned at the Montseny mountain, subalpin and alpine stages. Umbilicaria hirsuta and Umbilicaria grisea have been united and described as a separate species:

Codogno,M.,Poelt J,Puntillo (1989) Umbilicaria freyi spec-nova under Formenkreis von Umbilicaria hirsuta in Europa. Plant sytematics and evolution, n. 1-2, pp 55-69.

The species is known to occur from the Western Alps through Central France to the Pyrenees, Northern Spain, Italy and Sardinia.

Lichen growing on bare siliceous rocks, leafy thallus, attached at a single central point, upper side pale grey, no rounded ascocarps, lobe margins eroded and sorediate (&quot;parasoredia&quot;), soredia in this case originates from structured plectenchyma of the upper thallus layer, often curved downwards. Down side from brown to black, rhizinae. Up to 4 cms in diameter. 

Thallus K-, C+ red, KC-.

Armand Tomás Vidal

Nikon Coolpix 4.500.

Autoeye, PH,HTML Editor.]]></description>
    <pubDate>Sun, 12 Apr 2026 11:21:43 GMT</pubDate>
      <image>
      <url>http://digitalnatura.org/data/thumbnails/30/Freyae_copia.jpg</url>
      <title>Umbilicaria freyi (=Umbilicaria hirsuta)</title>
      <link>http://digitalnatura.org/details.php?image_id=5137</link>
    </image>
    
    <item>
      <title>Molt bona</title>
      <link>http://digitalnatura.org/details.php?image_id=5137#comment6252</link>
      <pubDate>Tue, 27 Feb 2007 06:52:11 GMT</pubDate>
      <description><![CDATA[Tinc la sensació de no estar a l'alçada (amb els meus comentaris) dels coneixements i experiència aportades en aquestes fotos i explicacions sobre cada espècie de liquen. Segueixo amb atenció les explicacions i aprenc tot el que puc.

Molt bon...]]></description>
          <category domain="http://digitalnatura.org/details.php?image_id=5137">DigitalNatura.Org - Umbilicaria freyi (=Umbilicaria hirsuta)</category>
              <author><![CDATA[fbaldris@sigmascorpii.com (Francesc Baldrís)]]></author>
              <guid isPermaLink="false">http://digitalnatura.org/details.php?image_id=5137#comment6252</guid>
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