Iris graminea L. introduction at the Donetsk Botanical Garden

The article presents an outcome of a comprehensive seven-year study on introduction of Iris graminea L. at the Botanical Garden in Donetsk. The morphology of vegetative and generative organs, phenological rhythms, dynamics of shoot growth, capacity for vegetative and seed reproduction, ontogeny, introduction success were studied, as well as the prospects of this species usage for landscaping in our region. In terms of introduction, I. graminea is characterized by relatively high levels of adaptation. This is proved by regular flowering and fruiting, complete small life cycle in the course of seed reproduction. In this case, in 3-4 years, seedlings successively pass the following age states: seedling, juvenile, immature, virginal and early generative plants, reaching the mature generative age in the sixth or seventh year. Research findings enable us to introduce the species into the range of ornamental perennials for greening in the region; the plants are recommended for landscape showcases and mixborders.