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What are the crust-like attachments on tree trunks and branches?

April 26, 2017attachments branches tree trunks

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What are the crust-like attachments on tree trunks and branches?

1 Answer

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10 Posted

Various forms and colors of Lichens may grow on the surface of tree bark. They represent a colony of symbiotic organisms that are not considered to be pathogenic to trees. Lichens often grow in response to increased exposure to light and moisture.