There is one group of lichens that is easy to spot. They are like miniature forests. The "trees" can take different shapes, the most obvious being a tiny goblet or "pixie cup."
Beneath the "trees" is a layer of tiny leaves (called squamules) like the grass in a forest.
This group all go by the name Cladonia and they come in many forms. As well as the cup shape, they can be thick and stumpy:
or pointy:
Some of them have blobs (called apothecia) on the ends, red in these pictures, which produce spores to spread the lichen. The green powdery appearance on the "trunk" (fairy dust!) is another way it spreads itself.
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