In other ways, too, the plant shows its capacity to act as a whole at various places of its organism. Otherwise, no plant could be propagated by cuttings; in any little twig cut from a parent plant, all the manifold forces operative in the gathering, transmuting, forming of matter, that are necessary for the production of root, leaf, flower, fruit, etc., are potentially present, ready to leap into action provided we give it suitable outer conditions. Other plants, such as gloxinia and begonia, are known to have the power of bringing forth a new, complete plant from each of their leaves. From a small cut applied to a vein in a leaf, which is then embedded in earth, a root will soon be seen springing downward, and a stalk with leaves rising upward. A particular observation made by Goethe in this respect is of interest for methodological reasons. In the introduction to his treatise Metamorphosis of Plants, when referring to the regressive metamorphosis of stamens into petals as an example of an irregular metamorphosis, he remarks that 'experiences of this kind of metamorphosis will enable us to disclose what is hidden from us in the regular way of development, and to see clearly and visibly what we should otherwise only be able to infer'. In this remark Goethe expresses a truth that is valid in many spheres of life, both human and natural. It is frequently a pathological aberration in an organic entity that allows us to see in physical appearance things that do not come outwardly to the fore in the more balanced condition of normal development, although they are equally part of the regular organic process. An enlightening experience of this kind came to Goethe's aid when one day he happened to see a 'proliferated' rose (durchgewachsene Rose), that is, a rose from whose centre a whole new plant had sprung. Instead of the contracted seed-pod, with the attached, equally contracted, organs of fertilization, there appeared a continuation of the stalk, half red and half green, bearing in succession a number of small reddish petals with traces of anthers. Thorns could be seen appearing further up, petals half-turned into leaves, and even a number of fresh nodes from which little imperfect flowers were budding. The whole phenomenon, in all its irregularity, was one more proof for Goethe that the plant in its totality is potentially present at each point of its organism.5 *