The three 'sets' of relationships defined by Fauth et al. (1996) in the form of a Venn diagram: 'Populations under study may be divided into three distinct sets'.

 
 
  Part of: Vincent B (2021) What has become of our cenosis? For a renewed cenology. Plant Sociology 58(2): 29-40. https://doi.org/10.3897/pls2021582/03