IN-PERSON Taught by Dr. Katherine Glew. Looking for an activity for those shorter winter days? 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 can tell us about air quality and the make-up of plants and geology. You will leave with a fresh understanding about lichens and...