Retrospective analysis of assortment of early flowering perennial herbaceous plants for the cities of Murmansk region

The quantitative and qualitative composition of 11 variants of the landscaping assortment of perennial herbaceous flower plants was developed in the Polar-Alpine Botanical garden-Institute. The most representative lists were in 1941 (99 species), in 2010 (109 species) and in 2020 (114 species). The proportion of early flowering species (flowering period from mid-May to late June) varied from 8 % to 20 % of the total number of species in different variants. The comparative analysis of the species diversity of early-flowering ornamental herbaceous plants showed its increase from 10 (1941 year) to 20 (2020 year) species. In the modern assortment, warm tones predominance in the color scheme (yellow-30 %, pink-crimson-25 %), which is favorable for northerners. The most resistant species (Erythronium sibiricum (Fisch. et C. А. Mey.) Kryl., Bergenia crassifolia (L.) Fritsch, Corydalis bracteata (Steph.) Pers., Viola altaica Ker-Gawl., Callianthemum angustifolium Witas., Fritillaria meleagris L.) from the first variant of the range have been preserved in the modern list.