Flora of the K.V. Ivanov square of Cheboksary of Chuvash Republic

The square named after K.V. Ivanov was founded in the 1930s. The total area of 5,3 hectares. Tilia cordata Mill. Predominates. The flora of the square contains 86 plant species from 74 genera and 35 families. The division Pinophyta is represented by two species – Larix sibirica Ledeb. and Picea pungens Engelm. Six species from the families Poaceae and Cyperaceae are monocotyled. The systematic diversity of the flora is very low. Virtually every genus is represented by only one species. The average level of species wealth in one family is 2,46. The number of families with one species is 19 (54,3%). The top ten in the number of species families concentrate 64% of the species. The spectrum of the leading families of the square flora indicates its thermophilic appearance. The share of synanthropic species in the flora as a whole is 61,6%. The index of synanthropization (Is) of the square flora is 1,61 and emphasizes the anthropogenic nature of the landscape. The aboriginal fraction of the flora is strongly altered (Is = 0,61). In the spectrum of life forms hemicryptophytes (33,7%), phanerophytes (30,2%) and therophytes (22,1%) dominate. According to the biomorphs system of I.G. Serebryakov perennial herbaceous plants (41,9%) dominate, whose spectrum reflects the forest type of biocenosis, annuals (22,1%), trees (19,8%) and shrubs (10,5%). In the ecologo-cenotic spectrum weed species (36%), forest species (18,6%), cultivar species (17,4%), meadow plants (11,6%) dominate. In the hygromorph spectrum mesophytes (72,1%) dominate, then xeromesophytes (15,1%) follow, the share of the remaining groups varies from 1,2 to 5,8%. In the spectrum of trophomorphs mesotrophs (57%) and megatrophs (37,2%) dominate. The square named after K.V. Ivanov is characterized by stability of functioning, provided by wood and shrub plantations. The lawn is heavily clogged and requires its reconstruction.