Programme of Conservation and Restitution of the Common Yew in Poland was initiated in 2006. The research determined variability of the species Taxus baccata L. clones originated from different sites, included in the Archive of Clones of Valuable Species in the Forest Inspectorates of Syców. Taxus baccata L. clones were obtained from parent trees growing in the Forest Inspectorate of Lubsko, Wdecki River Landscape Park, Forest Division of Żółwiniec, Forest Inspectorate of Woziwoda, Wierzchlas Reserve and Forest Inspectorate of Czersk. A foil tunnel experiment was established in the Prof. Stefan Białobok Forest Arboretum situated within the Forest Inspectorate of Syców. Each site was represented by the group of 100 clones. Eight months after the date of rooting process commencement the degree of rooting (%), number of lateral branches and length of spring shoots (cm) were estimated. The following morphological and anatomical observations and measurements were carried out: the number of stomatal apparatuses per 25000 pm² and their length (μm), thickness and width of needles (μm), size of needles of the layer of spongy and palisade parenchyma as well as the vascular bundles (μm). The results obtained were analyzed statistically. Cluster analysis was used to distinguish the groups among studied genotypes and to determine the distances between particular groups. Statistically significant variability of Taxus baccata plants originating from different sites was found for all characters studied. The seedlings from the first site - the Lubsko Forest Inspectorate - showed the highest rooting degree as well as the most advantageous number and length of spring shoots. The anatomical features of needles analyzed turned out to be helpful in determination of the variability in studied material relative to the origin.
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