INTRODUCTION EVALUATION OF TALL-GROWING ORNAMENTAL PERENNIAL HERBACEOUS PLANTS IN CENTRAL YAKUTIA
The results of introduction test of ornamental tall-growing perennial herbaceous plant species in the Central Yakutia are discussed. The climatic conditions of the introduction region are extreme and they are strong restrictive factor at introduction to the culture of many alien species and cultivar of ornamental plants. The condition of plants was evaluated by 4-score scale of introduction evaluation. The group of promising species is comprised of the following ones: Hemerocallis minor, Lilium pilosiusculum, Paeonia anomala, Delphinium grandiflorum, Aconogonon divaricatum, and other species. These species may be advised for urban greening. Intermediate promising species require special treatment: Tanacetum vulgare, Lilium lancifolium, Sanguisorba officinalis and S. parviflora. These species may be used for more restricted greening.