Abstract
The genus Lilium L. is important in the world flower market and morphological characters among species have been investigated. No comprehensive study of stem and leaf anatomy in wild species and hybrid cultivars has been done to date. Thus, the aim of study was twofold - to search for traits of diagnostic value for taxonomic purposes, as well as features to be practically utilized for improving the quality of Lilium-based horticultural hybrids for production as cut flowers and garden ornamentals. Stem and leaf anatomy in Lilium species of high ornamental value was studied using traditional anatomical techniques. The plants for study were grown outdoors and in protected cultivation (forcing) and sampled three times during the season. Morphological and anatomical traits and patterns in the structure of epidermal cells and cortex, thickness of supporting tissue, vascular bundles structure and location are discussed in regards to their diagnostic value and possible practical implementation. The presence of angular collenchyma in the cortex of Lilium ×elegans T.S. Ware, Asiatic hybrids was reported for the first time. The difference in anatomical structure between wild species and hybrids was noted. Anatomical features of diagnostic value, such as epidermal cell structure, vascular bundle and bundle sheath structure are an enriching addition to the most recent taxonomic treatments of the genus.
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