Fig. 2
From: Provenance variation and seed sourcing for sessile oak (Quercus petraea (Matt.) Liebl.) in France
Linear regression between provenance height at age 20 (HT20, in cm) at the site of Sillegny (whole sample of provenances) and the mean spring temperature (SPRMT, in Celsius degrees) at the origin of provenance. Legend: Vertical dashed line indicates SPRMT value at the site of Sillegny, black dots correspond to the French provenances. The blue line is the regression line (HT20 = 983 – 7.9 SPMRT; p < 0.03)