Fig. 25From: The adjustment of China endemic Heptacodium miconioides Rehd. to temperate zone of PolandRegression analysis of the correlation residuals (a) between the width of the ring of annual growth (µm) of Heptacodium myconioides and the year of research; and (b) between the width of the ring of annual growth (µm) and the order of rings on the cross-section (subsequent ring 1–6) (analysis for the years 2016–2021)Back to article page