Leaf morphological variability and intraspecific taxonomic units for pedunculate oak and grayish oak (genus Quercus L., series Pedunculatae Schwz.) in Southern Carpathian Region (Romania)

Q. robur leaf traits: pubescence intensity (PU), lamina length (LL), petiole length (PL), lobe width (LW), sinus width (SW), length of lamina at largest width (WP).197