For some months, I have been part of a U3A (University of the Third Age) group learning to identify different types of tree. We visit parks in the Dulwich area and also look at street trees, which are surprisingly varied. Drawing from tree specimens at different times of year helps to improve observation and memory.
This week I have been looking at catkins, one of the most familiar signs of approaching spring. The Himalayan birch has a brighter white bark than the more familiar silver birch, and is frequently being planted as a street tree in this area.