Physcia tenella
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Physcia tenella |
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| ( Scop. ) DC. |
Physcia tenella is a leaf lichen that is common in Central Europe.
description
Physcia tenella initially grows in small rosettes, which later often flow together like a lawn. The lobules of the thallus are white-gray to gray and 0.5 to 1 mm wide. The lobules end flat or in lip-shaped bent sores , where vegetative distribution units ( soredia ) are formed. These “lip sensorals” distinguish them from the otherwise very similar Physcia adscendens (which has helmet-like bulges at the ends of the lobes). There are gray-white fibrils at the edges. Fruit bodies ( apothecia ) are only rarely formed.
distribution
Physcia tenella is widespread and occurs mainly on the nutrient-rich bark of deciduous trees, only rarely on rock. It is often associated with Physcia adscendens . Due to its relative insensitivity to air pollutants, it is also often found in large cities.
literature
- Volkmar Wirth: Lichen flora . E. Ulmer, Stuttgart 1980, ISBN 3-8001-2452-1
- Bruno P. Kremer, Hermann Muhle: Flechten, Moose, Farne , Mosaik Verl., Munich 1991, ISBN 3-570-06652-5
