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British Soldiers is a lichen which gets its name from its resemblance to the uniforms worn by English soldiers during the Revolutionary War. A lichen is not just one organism, but a fungus and algae living together to form a new organism. The fungus in British Soldiers is called Cladonia cristatella. The algae is known as Trebouxia erici. Because lichens take the name of the fungus part of the relationship, British Soldiers is also known as Cladonia cristatella.
Seen on a fallen, rotting tree trunk. Timberline Trail, Allegheny National Forest, Marienville, PA, USA
I need help identifying this.