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The present work dealt with sexual reproduction capacity of three relic species of the genus Sternbergia (family Amaryllidaceae) distributed in the Caucasus, i.e., Sternbergia lutea (L.) Ker Gawl. ex Spreng., Sternbergia fischeriana (Herb.) Roem. and Sternbergia colchiciflora Waldst. & Kit.. Under this study, the natural populations of species, which possess valuable medicinal and ornamental properties, have been assessed by experts as vulnerable, and S. colchiciflora is included in the red list of endemic plants of the Caucasus, as having status of the critically endangered species. The situation is aggravated by the poor self-regeneration capacity of these species, which is one of the main factors responsible for the sustainability of the population of this or that species in the wild. Self-regeneration capacity for sexual reproduction was investigated in the listed species of the genus Sternbergia using common methods of embryology and reproduction biology. In conditions of the National Botanical Garden of Georgia (NBGG), the species S. lutea and S. fischeriana prove to be completely infertile and propagate vegetatively by bulblets, while S. colchiciflora revealed the ability for propagation by seed. Long-term conservation of seeds of the studied species S. colchiciflora in the Caucasus Regional Seed Bank (CRSB) and establishing of living collections of this species at the experimental plot were chosen as the method for safeguarding this critically endangered species.

Self-renewal Capacity of Several Species of the Genus Sternbergia Possessing Medicinal Properties