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        Summary
        
         
          
           | DescriptionFloristic regions in Europe (english).png | 
           
            English: Floristic regions in Europe and western Siberia, according to  Wolfgang Frey and  Rainer Lösch
              - The central european region and the central russian region are sister regions. The border between them is similar to the Fagus sylvatica limit (January, day-time temperature average: above -2°C).
 
              - The border between the central russian region and the boreal region is similar to the Quercus spp. limit (Day-time temperature average: above 10°C, 4 months per year).
 
              - The border between the boreal region and the arctic region is similar to the tree line, taiga/ arctic tundra limit (July, day-time temperature average: above 10°C).
 
              - The border of the atlantic region is the limit of no frost (average), Gulf Stream influence. 
                - The warm islands in the Atlantic ocean are in the macaronesia region: isolated populations in a more humid environment.
 
                
               
              - The mediterranean region is similar to the occurrence of wild Olea europea and wild Cistus salviifolius (Olea europea is grown very North in Italy).
 
              - The border between the submediterranean region and the central european region is similar to the alpine arc (upper Rhone, upper Rhine, lower Danube), a weather barrier.
 
              - The pontic region border is similar to the tree line/ steppe limit (less than 450 mm precipitation per year).
 
              - The turanian region has a semi-arid climate.
 
              - References: 
                - Frey W, Lösch R (2004) Lehrbuch der Geobotanik. Elsevier, Spektrum; München, Heidelberg;  ISBN 3-8274-1193-9 (graphic modified from Walter H (1954) Grundlagen der Pflanzenverbreitung. Einführung in die Pflanzengeographie, II. Teil: Arealkunde. Ulmer, Stuttgart-Ludwigsburg)
 
                - Frey W, Lösch R (2010) Geobotanik: Pflanzen und Vegetation in Raum und Zeit. 3 ed, Spektrum, Heidelberg,  ISBN 978-3-8274-2335-1
 
                
               
              
             
            Français : Régions floristiques européennes actuelles (Europe et Siberie occidentale), selon Wolfgang Frey et Rainer Lösch 
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           | Date | 
           2008 | 
          
          
           | Source | 
           Own work | 
          
          
           | Author | 
            User:Olahus | 
          
         
         
         Licensing
        
         
          | Public domainPublic domainfalsefalse | 
         
        
        
         
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          I, the copyright holder of this work, release this work into the  public domain. This applies worldwide. In some countries this may not be legally possible; if so: I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.Public domainPublic domainfalsefalse 
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