When Rudolf removed a large rock, this
'population' of
Copiapoa
was revealed. There were no plants for kilometres around as this area
lies behind the high coastal mountains that prevent rain or fog from
drifting in from the Pacific Ocean. How can these plants survive? Rudolf
goes to water them 'regularly' i.e. approximately once per year!
Amazing how variable these plants are, asuming that they are
representatives of just one species.