Iris sibirica L. (Iridaceae Juss.) in nature and cultural conditions in the South Ural botanical garden

The paper presents the results of studying the biology of Iris sibirica L. from the genus Iris L. of the fam-ily Iridaceae Juss. I. sibirica is included in the list of species that need special attention to their state in the natural environment and monitoring in the Republic of Bashkortostan. It is a rare species in many regions of Russia – the Republics of Komi and Tatarstan, Orenburg, Sverdlovsk, Samara Regions, the Perm Region, etc. In 2018–2020 the seasonal rhythm of development, morphometric parameters, reproductive capacity in 8 cenopopulations of the Trans-Urals of the Republic of Bashkortostan and in cultural conditions - in the South Ural Botanical Garden-Institute (Ufa) were investigated. I. sibirica is a plant of the early summer flowering cycle, belongs to the group of long-flowering species, the average flowering period is 28 days, the fruiting phase is on average 56 days, the average growing season is 177 days. The growing season ends in the first half of October. I. sibirica plants undergo a full development cycle in the South Ural Botanical Garden-Institute. Study of biometric indicators of plants I. sibirica showed that most of the pa-rameters under conditions of introduction are close to natural or exceed them. I. sibirica is characterized by relatively low real seed productivity. The coefficient of seed productivity in nature is slightly higher (73.7 %) than in culture (68.9 %). On average, one shoot of cultivated plants accounts for 120 pieces seeds, which is 1.2 times less than in nature. The decorative and medicinal qualities of I. sibirica make it possible to recommend it for wide cultivation not only in the Bashkir Cis-Urals, but also in the Southern Urals in general and in many other regions of Russia. Cultivation of the rare species I. sibirica is one of the ways to pre-serve its biodiversity.