Figure S1. Dates of bud set for all genotypes that did not lammas in 2008, plotted according to provenance (latitude of origin) and common garden location (Vancouver, open circles; Indian Head, closed circles).

Figure S2. Green-cover period ratio (number of post-bud set days over pre-bud set days) in Populus balsamifera provenances at Vancouver (open circles) and Indian Head (closed circles). Exponential curve fit is plotted using latitude of origin as the independent variable. Error bars omitted for clarity.

Table S1. Latitude of origin of Populus balsamifera provenances used for this study. Provenances marked by were excavated from both common gardens to determine root:shoot ratio. Provenances marked by * were used in the growth chamber study.

pce2560_sm_SuppInfor.docx154KSupporting info item

Please note: Wiley Blackwell is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.