Atlas Florae Europaeae: Distribution of Vascular Plants in Europe - Google Books

https://books.google.de/books?id=WivqB4eYhukC&pg=RA1-PA158#v=onepage

From the point of view of plant geography, including various aspects of chorology, one of the prerequisites of successful large-scale synthesis of this type is and adequate flora covering the area in question, and provding a common language in respect to…