Apple trees with red flowers are particularly attractive during the flowering period, which makes them a desirable component of ornamental plantings. 30 samples of apple trees with anthocyanin colouration of organs were studied in the collection of educational and research laboratory “Genetic resources, introduction and selection of non-traditional fruit and ornamental crops”, located at the Agronomic Experimental Station of the separate division of NUBIP of Ukraine. In 2001, phenological observations were made during flowering, morphometric analysis of flowers and leaves was carried out, and the decorative value of samples was evaluated. The dominant gene that controls anthocyanin pigmentation of organs in apple trees comes from Malus Niedzwetzkyana – Nedzvetsky apple trees. Now the rank of this taxon is lowered to a variety – M. domestica var. niedzwetzkyana. The Nedzvetsky apple tree was involved in crossing with small-fruited apple species to create decorative hybrids, some of which received hybrid names and were used in the selection of fruit varieties and rootstocks of M. domestica. According to the International Code of Nomenclature of cultivated plants, varieties with anthocyanin colouration of petals that have M. domestica var. niedzwetzkyana in the pedigree can be distinguished as Malus Niedzwetzkyana Group. If it is supplemented with varieties with anthocyanin colouration of petals, originating from other types of apple trees, for example, M. halliana and M. spectabilis, then the extended group can be called Malus Purpurea Group. At the same time, some varieties may belong to other groups, in particular, Malus Pendula Group, Malus Redflesh Group, etc. The highest decorative value (5 points) during flowering is inherent in samples No. 2332 ‘Makamik’, 2947, 3100 ‘Aldenhamensis’, 3157 ‘Pionerka’, 3305, 3382, 3540, 3592, 3601, 3603, 3656, 3691, 3692, 4292, and hybrids ‘17- 279’, ‘17-316’, ‘18-275’, ‘18-293’, ‘18-325’. The use of these samples allows creating a conveyor of elongated flowering of red-flowered apple trees at green construction sites
ornamental apple trees, blooming, varieties, species, anthocyanin coloring, Malusdomestica var. niedzwetzkyana