Flora of the railways in Moscow city

The results of the Flora of Moscow railways studies since 1851 (date of the first railroad in Russia foundation) till 2015 are summarized. The check-list comprises 1 119 species (499 indigenous, 620 alien), belonging to 93 families. Within alien component of the Flora several important differences compare to indigenous component are recorded: the list of 13 leading families does not include Cyperaceae, ranks of Caryophyllaceae and Scrophulariaceae are lower, while Chenopodiaceae, Apiaceae and Boraginaceae are higher in ranking. There is a strong correlation between plants' life form and pathway. In the group of woody plants "the escapees" predominate (10 times more species than within the group of occasionally contaminated plants). Within the group of herbaceous perennials occasionally contaminated plants have 2 times more species than in the group of "the escapees". Within the group of annuals occasionally contaminated plants are 3 times more numerous in species than "the escapees". Consistent patterns of naturalization processes in flora of railways and its alien fraction for the Moscow region are similar.