Figure legends
Figure 1. Thirty populations of Boechera stricta are located in
the Medicine Bow National Forest in southeastern Wyoming
Figure 2. A comparison of the 30 populations for circadian values of the
families within each population demonstrates a large range of the trait
in many of the populations. In the figure, mean values are represented
by a gray dot and populations are ordered by mean value of the
population from shortest to longest circadian period.
Figure 3. The within-population variation of two populations (Sand Lake
(a; SDL) and Crow Creek (b; CRW)) represent the two extremes of the
range for family values. The CRW population has over 5 h range from the
shortest to longest family, while the SDL population has just over 0.5 h
range.
Figure 4. As a univariate explanation, elevation of the populations has
a strong impact on the a) mean value of circadian period for the
population and b) the range of family values within each population.
Figure 5. The relationship between elevation and the first 4 principal
components, showing the strongest relationship along the first
component.
Figure 6. Principal component analysis of the environmental variables
across the 30 populations demonstrates a strong separation of the low
and high elevation populations along the first component.