Statistical analyses
A Kruskal‐Wallis test was used to compare the values of each leaf trait (laminaLMA, trichomeLMA, lamina thickness, trichome thickness, leaf area, characteristic leaf dimension) among the elevational sites. A single regression analysis was used to analyze the association between trichome thickness and the temperature difference between intact and trichome‐shaved leaves at the 1800 m site. For the statistical and model simulation analyses, we used the R statistical package (v.3.5.0; R Foundation for Statistical Computing, Vienna, Austria).