In the case of botany, the path which was destined to lead furthest in the end was the apparently unpromising one of medicine. Various plants from very early times had been used as healing agents, and it became necessary to study them in detail, simply in order to discriminate the kinds employed for different purposes. It was from this purely utilitarian beginning that systematic botany for the most part originated. As we shall show in later chapters, nearly all the herbalists whose work is discussed in the present volume were medical men. The necessity for some means of recognising accurately the individual species of medicinal plants led in time to a sounder and more exact knowledge of their morphology than had ever been acquired under the influence of thinkers such as Albertus Magnus, who regarded with some contempt the idea of becoming acquainted in detail with the countless forms of plant life.
The mass of observations relating to herbs and flowers, accumulated during a period of many centuries, largely for medicinal purposes, is to-day serving as the basis for far-reaching biological theories, which could never have arisen without such a foundation.
It is not systematic botany alone that we owe in the first instance to medicine. Nehemiah Grew (1641-1712), one of the founders of the science of plant anatomy, was led to embark upon this subject because his anatomical studies as a physician suggested to him that plants, like animals, probably possessed an internal structure worthy of investigation, since they were the work of the same Creator.
In Ancient Greece there was considerable traffic in medicinal plants. The herbalists[2] and druggists[3] who made a regular business of collecting, preparing and selling them, do not appear however to have been held in good repute. Lucian makes Hercules address Æsculapius as “a root-digger and a wandering quack[4].”
The herbalists seem to have attempted to keep their business select by fencing it about with all manner of superstitions, most of which have for their moral that herb-collecting is too dangerous an occupation for the uninitiated. Theophrastus draws attention to the absurdity of some of the root-diggers’ directions for gathering medicinal plants. For instance he quotes with ridicule the idea that the Peony should be gathered at night, since, if the fruit is collected in the daytime, and a wood-pecker happens to witness the act, the eyes of the herbalist are endangered. He also points out that it is folly to suppose that an offering of a honey-cake must be made when Iris fœtidissima is rooted up, or to believe that if an eagle comes near when Hellebore is being collected, anyone who is engaged in the work is fated to die within the year.
The herbalists’ knowledge of plants must have been in the first place transmitted from generation to generation entirely by word of mouth, but as time went on, written records began to replace the oral tradition. The earliest extant European work dealing with medicinal plants is the famous Materia Medica of Dioscorides, which was accepted as an almost infallible authority as late as the Renaissance period.
Dioscorides Anazarbeus was a medical man who probably flourished in the first century of the Christian era, in the time of Nero and Vespasian. Tradition has, however, sometimes assigned to him the post of physician to Antony and Cleopatra. His native land was Asia Minor, but he appears to have travelled widely. In his Materia Medica he described about five hundred plants, with some attempt at an orderly scheme, though, naturally, the result is seldom successful when judged by our modern standards of classification. The actual descriptions of the plants are very slight, and it is only those with particularly salient characteristics which can be recognised with any ease. Careful research on the part of later writers has however led to the identification of a number of the plants to which he refers.
There is a famous manuscript of Dioscorides at Vienna, which is said to have been copied at the expense of Juliana Anicia, the daughter of the Emperor Flavius Anicius, about the end of the fifth, or the beginning of the sixth century. The character of the script settles the age within narrow limits. Juliana lived into the reign of Justinian, and was renowned for her ardent Christian faith, and for the churches which she built. The manuscript which bears her name is illustrated by a number of drawings, which are in some cases remarkably beautiful, and very naturalistic. A facsimile reproduction of this manuscript was published in 1906, and it is thus rendered accessible to students. Examples of the figures are shown on a reduced scale in Plates [I], [II] and [XV].
Plate II