The species Glycyrrhiza glabra L. is a perennial herbaceous plant, distributed mainly along the Danuve River. The species has disappeared in recent years, necessitating the search for maximum conservation methods. By applying the in vitro method, it is possible to preserve and maximally reproduce the species under controlled conditions. The relationship between height and number of leaves in adapted plants was investigated to determine the statistical relationship between them. The regression coefficient found a relationship between height and number of leaves in plants.