Abstract
Introduction
The title of this article will be understood immediately upon consideration of figure I. It shows a cluster of shrubs set off by more or less homogenous irregular masses of herbaceous plants and perennials, similar to what we might see in fields. At least two different types of plants are in bloom. Here and there, parts of the ground seem to have been left bare. Clearly this is a field going fallow, much like we might find anywhere where the soil has been worked and then left on its own, or on sites hampered by a poor, dry growing medium, where the bedrock rises to the surface.