Krokhmal I. Introduction of the genus Hemerocallis L. (Hemerocallidaceae R. Br.) species and varieties to Donbass and perspective of their usage in ornamental horticulture

Research subjects: species and varieties of the genus Hemerocallis L. (Hemerocallidaceae R.Br.). Research objectives: to reveal biomorphologic peculiarities of species and varieties of the genus Hemerocallis L., to investigate their ornamental qualities and adaptives capacity, productivity and tolerance under Donbass conditions, to select their assortment for using in modern greenery planting (landscape design). Reseach methods: phenologic observations methods, study of plant ontogenesis, investigation of seed production, anatomic-and-morphologic methods, mathematical statistics methods. Theoretical and practical results: the results of complex investigations of biomorphologic and ornamental pecularities of species and varieties of the genus Hemerocallis L. in Donbass have been generalized. Indices of adaptive capacity and perspectives of using the genus Hemerocallis L. species and varieties in landscape desigh have been scientifically grounded. The scheme of biomorphologic and ornamental charactersof Hemerocallis hybrida Hort. varieties has been developed. The system of assessment of Hemerocallis L. varities according to ornamental and floristic-biological pecularities has been developed. The most ornamental and tolerant combinations of species and varieties of the genus Hemerocallis L. with other perennial plants have been developed. Those combinations can be used as fragments of projects for parks and public gardens. Novelty of the introduced For the first time, under conditions of the south-east of Ukraine biomorphologic peculiarities of species and varieties of the genus Hemerocallis L. have been studied. Duration of the basic phenophases , real seed production of species and varieties have been determined. Morphologic peculiarities of pollen seed have been revealed. Vital capacity of pollen. Age states of the species and varieties representatives, their terms and duration under new conditions have determined. Under introdaction to Donbass of Hemerocallis hybrida Hort. varieties, 7 types of morphologic anomalies of generative organs, have been described for the first time. Adaptational strategy of the genus Hemerocallis L. under conditions of Donbass has been determined for the species and varieties which are characterised by leaf xeromorphity. Implemental degree 200 plants of 4 species and 10 varieties of the genus Hemerocallis L. are given to the municipal services of greenery landscaping planting of Kalininskiy district of Donetsk. Effectivenes Optimum ways of day-lilies are determined. Species and varieties with high coefficient of vegetative propagation are distinguished. 34 varieties with high content of viable pollen are distinguished and recomended as donors of pollen material for selectinal works. 5 very promising, species and 41 varieties are distinguished for implantation in modern landscape design. The principles of their using in ornamental horticulture of the region. Shere, sector of implementation: botany, greenery planting, landscape design, ecology, specialist training.