At more than 5000 feet altitude in the Reserva Nacional de Montes Universales near Frias you can see a wonderful mosiac landscape. Dotted across the barren, lichen rich hillsides are vera-esque regeneration circles of juniper, cypress and berberis and in nearly every one there is a young emerging scots pine. It appears to be able to regenerate because of the protection from the prickly scrub. How fast do these circles grow? Why do they seem never to coalesce? How do they start?