Back in the 1980s, Zimbabwe was in the grips of a fuel crisis (remember those?!). Motorists would sit patiently for hours, queueing outside filling stations waiting for fuel. As these queues became an increasingly common feature of people’s daily lives, so certain landmarks associated with the queues also assumed central importance. One of these was a large umbrella thorn tree (Acacia sieberiana) on Clyde Road in the Zimbabwean capital Harare, which provided shade for many weary motorists as they waited. So famous did the tree become that it was listed in Lyn Mullin’s book “Historic Trees of Zimbabwe”. In this episode, Gus, the African Plant Hunter, abandons the rural bush and goes tree spotting in the urban jungle, in search of this notable monument to a not-so-bygone era…..