Question 1

What is the most common type of lichen?

Accepted Answer

Crustose types make up the largest group. They grow on rocks, tree bark, and walls in many different regions.

Question 2

What are the three main types of lichen?

Accepted Answer

The three main types are crustose, foliose, and fruticoseThey resemble, respectively, crusts, leaf-like plates, and branching shrubby structures.

Question 3

Can I identify lichens from a photo?

Accepted Answer

Yes. The Botan app works as a lichen detector and allows you to identify species using photographs. Simply upload a clear, close-up image that shows the shape and texture, and the app will suggest a potential identification.

Question 4

What is the difference between lichens and mosses?

Accepted Answer

Lichens are a symbiosis between a fungus and an alga or cyanobacteria. Mosses are plants with tiny stems and leaves.

Question 5

Where do lichens usually grow?

Accepted Answer

Lichens grow on tree bark, rocks, soil, wood, walls, and roofs. Some species can even appear in harsh environments, such as on mountain peaks.

Question 6

Are lichens harmful to trees?

Accepted Answer

No. They use tree bark merely as a support structure and produce their own nutrients.

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