Ecology, seeing the relationship of living things to their total environment, is the subject of this book. Mrs. Watts, a naturalist of the Morton Arboretum in Illinois focuses on the plant and factors governing its development. The plant is seen in both its historical and contemporary perspective. Moving by chapters from one type of environment to another, the story of plants unfolds in a rather literary way, definitely presupposing, however, some background in botany. A defined market.