Results of linear mixed models testing whether leaf traits of white protea seedlings differ based on the year of measurement, the season of measurement, species effects, or their interaction.

The two gardens were analyzed separately using Proc MIXED with repeated measures on seedlings and an unstructured (UN) covariance structure. Log transformations were performed as needed to improve the normality of residuals. n = 52 plants for Kirstenbosch (except SLA with 51) and 161 for Jonaskop. Sixteen missing values for Aa and g were imputed with proc MI and MIANALYZE in SAS 9.3. Log transformations were used on stomatal density, pore index, and conductance. Asterisk indicates theta values from MIANALYZE rather than F-values.