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Star-tipped reindeer lichen

Balls on the rocks

Star-tipped reindeer lichen © Teemu Saloriutta
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Star-tipped reindeer lichen (Cladonia stellaris) forms spherical, yellow or grey-tinted growths on rocks. Lichens grow very slowly, due to which picking them is not covered by everyman’s rights. They also cannot withstand being stepped on, so movement in their growth sites should be avoided.