In his works 'Solitaria', 'Fallen Leaves' and 'The Apocalypse of our times', Russian thinker and publicist Vasily Rozanov created a remarkable type of text which, for its radically innovative nature, was marked as a new genre by V. Shklovsky. The study deals with the evolution of this 'genre' in Rozanov's works and identifies its three phases. In his early works ( ponimanii, Dostoevsky and the Legend of the Grand Inquisitor), Rozanov was trying to write classical discursive texts. At the turn of the 19th century, he started editing dictionaries (Sumerki prosveshchenia, semeinyi vopros v Rosii, Metafizika khristianstva and others) which attain characteristics of a specific genre. From this perspective, the genre of 'Solitaria' represents the culminating phase of the evolution of this literary form. The dynamics of the genre of 'Solitaria' is not exhausted; the study summarizes the results of the leading researchers in this field, from which follows that other changes occurred in the genre itself. The poetics of Rozanov's works grew by its own dynamics to the personalisation of the synthetic efforts of the Russian post-symbolism.