Trees data were collected on the field Rings data were collected using the software WindendroTM Knot geometry was extracted using the ImageJ 1.44 free software, with a Java plug-in ('Gourmand', version 1.01) developed at INRA, Nancy, France. Data description: TreeID Tree ID LogID Log ID KnotID Knot ID Year Cambial age Aget Age of the tree at time t RWt Annual ring width at time t (mm) lt Distance from the from the pith of the stem at time t (mm) GUlen Length of the annual growth unit (m) GUpos Relative position of the knot initiation point along the annual growth unit (varies from 0 to 1) RN Annual ring number from the pith of the main stem at the level of each knot Hk Position of the initiation point of the knot along the stem (ground level = 0) (m) Azimut Azimut of the knot Zt Predicted knot vertical position at time t (mm) Dt Predicted knot diameter at time t (mm) ?Dt Annual increment of the knot diameter from time t-1 to t (mm) ?Zt Annual increment of the vertical position of the knot from time t-1 to t (mm) KnotRank Rank of the knot along the growth unit NBR Number of branches per growth unit DBHt Diameter of the tree at 1.3 m at time t (mm) SumKnotAreat Sum of knot areas at time t BasalAreat Tree basal area at time t KSRt Ratio of total knot area increment to the stem basal area increment at time t Ht Total height of the tree at time t HDt Ratio of total tree height to DBH calculated for each year of growth at time t