ABSTRACT
The text is composed of an introduction and a conclusion (without headings) and of three parts, entitled:
Influences due to latitude and altitude.
Influence of moisture.
Other less important influences.
The final two paragraphs serve as a summary of the article: “These are the conclusions that we have been able to deduce from our observations of nature. To render them more than simply hypotheses, it is necessary to vary experimentally the different physical conditions in which the plants grow and study the modifications thus produced artificially.
“The plants undergo many other changes depending on the different conditions in which they are grown. We have only spoken of the few facts we observed. By discussing the methods behind our observations, our intention was merely to show that the careful study of the distribution of plants and the modifications that they themselves undergo can give precious information about the causes of their variation, and that in certain respects botanical geography can serve as a useful guide to anatomy and physiology.”
