The Cotoneaster medik. species grown in the middle taiga subzone of the Komi Republic (Russia)

The paper includes biomorphological description of 16 Cotoneaster Medik. species introduced in the middle taiga subzone of the Komi Republic (Russia). Seven of them ( Cotoneaster lucidus, C. melanocarpus, C. integerrimus, C. dammeri, C. horizontalis, C. x hybrida ( C. uniflorus × C. melanocarpus ), C. buxifolius ) for more than 10 years grow and bear fruit in the Arboretum of the Botanical Garden at the Institute of Biology. The other 9 new species ( C. roseus, C. bullatus, C. camilli-schneideri, C. allochrous, C. alaunicus, C. amoenus, C. cinnabarinus, C. ascendens, C. niger) were grown from seeds, sown in 2009 and replanted in 2013 to the permanent place in the Arboretum reasoning from the geographical principle of their origin. The studied species were examined for winter resistance in new growth conditions. Average values of phenological dates obtained throughout years of research are given. The seasonal dynamics of shoot growth in 7 fruit-bearing species was studied. They were tested for seed productivity and vegetative reproduction ability. Promising species such as Cotoneaster lucidus, C. melanocarpus, C. integerrimus, C. dammeri, C. horizontalis, and C. x hybrida (C. uniflorus × C. melanocarpus) were selected and recommended for cultivation and use in landscaping in Northern cities.