Dendrology is the study of trees. The term has the same root as dendrite which comes from the Greek dendron, meaning tree. Who would have thought that having to wait for a while outside the local electrical shop would yield such a beautiful source of dendritic patterns in the stone cladding of the building – one I have either walked past or have parked outside many times:

Although they look like fossilised imprints of ferns or minute trees, they are actually the result of manganese oxides that have crystallised on the surface and are fairly commonly found on sedimentary rocks.