Plant communities, synusiae and the arithmetic of a sustainable classification

We propose an equation to evaluate the efficiency of a classification as function effort required and population size data collectors. The formula postulates “classification coefficient”, which relates not only complexity object be classified, but also availability representativeness. When applied phytocoenoses, suggests that system based on vascular plants offers best compromise between sampling effort, resolution power availability. discuss possibility basing vegetation plot records for all macroscopic photoautotrophic organisms co-occurring in vertical projection given ground area, recently suggested by some authors. argue inclusion cryptogams description phytocoenoses dominated should rely synusial approach, conceived complementary traditional Braun-Blanquet approach. Syntaxonomic reference : Mucina et al (2016).