Urban Observation of the Week: Stop Sign Lichens

What is a lichen? Is it a plant? Is it fungus?

Actually, lichen are a group of symbiotic fungi and algae! They are typically found in moist environments, growing on rocks and trees in the forest. Today’s observation was found on a crosswalk sign!

Do you have a photo or video of an urban species doing something unusual? What about a rare plant or animal that you were surprised to find in a city? If so, let Lindsay know or Tweet at us and you could be featured as a future observation of the week!

 

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