Tussilago farfara (ASTERACEAE), AN INVASIVE SPECIES IN THE USSURI NATURE RESERVE (PRIMORYE TERRITORY)
The article deals with the problem of introduction and distribution of an adventive plant Tussilago farfara L. in the Ussuri Reserve. In the Primorye Territory (Vladivostok, Okeanskaya Station), the species was first identified in 1962. More than fifty years later, in 2015, several individuals of this plant alien to the Reserve flora were revealed in a disturbed habitat (landslide). The botanical characteristics, number and condition of the population in the protected area are given in the work. Currently (2017), T. farfara in the Ussuri Nature Reserve is represented by a single fragmented coenopopulation of 600 plants. Separate parcels of T. farfara are distributed throughout the locality. Its active settlement on a scree slope free from other plant species is alarming. On the border of the habitat, there is a virgin forest. We assume that the crowns of old trees, as well as abundant regrowth, powerful undergrowth and perennial herbaceous plants will not allow the invader to penetrate into natural communities. Observations of the condition of this species on the protected area will be continued.