The collection of introduced perennials open ground plants of Polar-Alpine Botanical Garden

The results of introductions of perennial herbaceous plants in open ground in polar-alpine botanical garden at 68° northern latitude are presented. The collection of perennial herbaceous introduced contains 2535 samples of 1409 taxa belonging to 270 genera and 56 families. Collection of plants is the center of the primary introduction of plants in the Arctic. It is unique gene pool reserve of plant species from different regions of Earth: rare and endangered species, edible, fodder and medicinal plants. They can be the base of scientific investigation in plant introduction and teaching and practical base for students of universities and institutes. The most numerous families in collection of plants are Asteraceae (55 genera, 230 species), Ranunculaceae (21 genera, 156 species) and Rosaceae (13 genera, 89 species). There are 351 rare and endangered species of 153 genera (36 families) among studied plants. They are included in different Red Books of Russia and other countries. It lets to keep some rare plants in natural cenosis and cultural plantations. 555 samples of plants are contained in the collection more than 60 years: samples of 46 species > 80 лет, 144 species > 70 лет, 188 species > 60 лет. Most of the plants in the collection are in a generative state: 86 % of all plants are flowering and fruiting. Some species expend into forest communities around nurseries. Some species can bloom twice in the most favorable weather conditions. The results of introduction meet practical use in green construction. The current assortment of decorative plants for Murmansk Region has 115 introduce species.