It has been suggested that populations of a species that occur at the edges of its range are more prone to collapse and generally do not perform as well as populations near the center of the species range, but this has yet to be established as consistent across species. Functional traits in plants are those that illustrate a particular aspect of how an individual or species has adapted to or is affected by its environment. These traits can be morphological, physiological, or phenological in nature. Leaf functional traits play an important role in various processes, including plant growth and response to abiotic stressors, and have been shown to vary between species, communities, and habitat types. There are, however, few studies which have looked at intraspecies variation in leaf functional traits. In order to better understand how these traits might vary between edge of range and center of range populations, as well as how a species might react to a changing climate, we will measure various leaf functional traits associated with drought tolerance in a widespread manzanita species, Arctostaphylos glauca. Arctostaphylos glauca, the big berry manzanita, is one of the relatively few widespread species of the genus and has populations which occupy a range of habitat types throughout much of the California Floristic Province. The majority of A. glauca populations occur in chaparral habitats, but there are a few populations on the edges of its range which are in atypical environmental conditions, including maritime coastal locations, montane areas, and a known desert population. We examine a suite of leaf functional traits associated with drought tolerance to determine if there are significant differences in the means and variance of those traits between populations of A. glauca found at the edges of its range and those which occur in its more typical chaparral habitat. We also investigate if these drought-associated leaf functional traits vary with seasonal changes throughout a year.