crottle

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crottle

lichen

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description and uses

In Parmelia
…the species commonly known as crottle and skull lichen. Crottle, the largest foliose lichen, resembles crumpled leather and sometimes grows 90 to 120 centimetres in diameter. It is characterized by a black underside. The central portion may die out, leaving a toadstool-like fairy ring. It is used as a reddish…
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