This classic lovingly studies the plant world. It is the fruit of a lifetime of patient and detailed observation of nature. Volume One begins with the flowering plant, and then turns to the living face of Earth. Grohmann then goes on to consider the threefold nature of the plant and the nature of the human being. Finally, there is a description of the "ladder of the plant kingdom." Volume Two adds further plant descriptions and extends the cosmological viewpoint begun in the first volume.