Q: Bill, on the bark of my Crepe Myrtles, I noticed grayish growth. I can peel this growth off fairly easily. What is this growth and is it hurting my tree? A: It sounds like you have lichens. Lichens ...

Gardeners and homeowners often contact our Horticulture Hotline at Cornell Cooperative Extension in Oriskany when they notice a grayish blue-green crusty or mossy looking growth on trees, shrubs, ...

After more than 40 years collecting, classifying and studying the life forms known as lichens, Dr Gintaras Kantvilas, from the Tasmanian Herbarium, has only scratched the surface of Australia’s ...