Taught by Dr. Katherine Glew. Have you always wondered about what lichens are and why they are found on your trees, Rhododendrons and Azaleas? Lichens are harmless to your plants and add aesthetic value to your garden. Learn about common lichens found in an urban environment and what they tell us about air quality, forest health, geology and why they are indicators of changes in the climate, ecosystems and geology. You will leave with a fresh understanding about lichens and a user-friendly chart that lists lichens found in your neighborhood.

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