MaX-DooM's avatar
Hypothesis: the ring of viriland grass comes from a single, mutant, extra-virilant plant.
as it grows ti wipes the soil of nutrients in a single generation burst but leaves a circle of descendants around it.
Those in turn wipe the soil of all nutrients and die within a genreation but again leave a ring outside them of descendants.
this goes on over seceral generations leaving a barren hole in the center of a ring of virilant plants?