Taxonomy of the sempervivum ciliosum and S. ruthenicum (crassulaceae) complexes on the balcan peninsula

[M. D. Jovanović]

368 str.

Biografija autora: str. 365. Bibliografija: str. 366-368.

Botany

The yellow-flowered Sempervivum taxa from the Balkan Peninsula, tentatively classified into the Sempervivum ciliosum (S. ciliosum, S. galicicum, S. jakucsii, S. klepa, S. octopodes) and S. ruthenicum (S. kindingeri, S. leucanthum, S. ruthenicum, S. zeleborii) complexes, exhibit notable phenotypic plasticity. Additionally, the frequent occurrence of spontaneous hybridization, coupled with the limited number of studies addressing their variability, has resulted in inconsistent classification schemes and ambiguous taxonomic relationships. This study aimed to analyze the extent of the inter- and intraspecific variability of a wide range of morphological, anatomical, carpological, and palynological traits to enable the morphological delimitation of complexes, distinguish similar taxa, and differentiate hybridogenic from parental taxa, ultimately facilitating a taxonomic reevaluation. Univariate and multivariate statistical analyses revealed a moderate to high degree of variability in the examined characteristics, with a discernible clinal variation pattern observed within populations of the hybridogenic taxa S. ciliosum x marmoreum, S. jakucsii x marmoreum, and S. kindingeri x macedonicum. The same analyses supported the justification for the recognition of the distinct complexes, as well as different patterns of differentiation between closely related taxa, including hybridogenic and parental populations. The results substantiate the taxonomic distinction of S. ciliosum, S. galicicum, S. jakucsii, S. klepa, S. kindingeri, S. leucanthum, and S. zeleborii at a higher taxonomic rank. However, the taxonomic status of S. octopodes remains unresolved. Furthermore, evidence suggests that populations previously ascribed to S. ruthenicum are likely of hybridogenic origin, arising from interspecific hybridization between the aforementioned species and S. marmoreum. Given the endemic nature and restricted distribution of all taxa studied, the findings underscore the necessity of incorporating these species into active conservation projects.

sempervivum ciliosum kompleks, S. ruthenicum kompleks, Balkansko poluostrvo, varijabilnost, morfologija, epidermalne strukture, karpologija, palinologija, multivarijacione analize, geometrijska morfometrija, taksonomija

sempervivum ciliosum complex, S. ruthenicum complex, Balkan Peninsula, variability, morphology, epidermal structures, carpology, palinology, multivariate analysis, geometric morphometrics, taxonomy

(57.063.6:582.711.16)(1-924.64)

B 004; B 290

Tekst