But let's not forget the lichens. A hardy growth on the sides of tree trunks that often appears to be like paint has been on trees all winter. In the cold and dry winter air, they persist ...

Lichen is a topic that’s not usually covered in the news. So, for those unversed in the subject, lichen are those weird crusty growths on churchyard headstones, old trees, roof tiles or, in the case ...

A recent Frontiers in Ecology and the Environment study cataloged a wide variety of lichens, mosses and liverworts living on the urban trees of Vancouver, Canada.

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