QUANTITATIVE ANALYSIS OF DISTRIBUTION FOR SIBERIAN VASCULAR PLANTS ON FAMILY LEVEL
Quantitative analysis of vascular plants distibution in the seven floristic provinces of Siberia is performed on family taxonomic level. Three groups of provinces are recognized by families richness: number of families no more than 90 (for arctic climatic zone); from 90 to 110 (for boreal climatic zone), and more than 110 (for hemiboreal zone). Gradients in family richness are calculated inside and between group of provinces in climatic zones. Total revised number of vascular plants families is equal 151, including 70 pansiberian ones.