Supplementary Table 1 Allometric relationships between leaf length (L), width (W) and the leaf area (A)

in primary leaf and trifoliate. For trifoliate, L and W of the terminal leaflet were used. As all leaflets were not

simultaneously fallen, the relationships were determined for leaves that have three leaflets, two leaflets or one leaflet. When the leaves had no terminal leaflet, the lateral leaflet was used.

　 　 　 　　 Regression r n

Primary leaf A = 1.21 + 0.75 x L x W 0.98 107

Trifoliate with three leaflets A = -5.58 + 1.97 x L x W 0.99 571

Trifoliate with two leaflets A = -3.82 + 1.32 x L x W 0.99 1717

Trifoliate with one leaflet A = -1.94 + 0.66 x L x W 0.98 1740

　 　 　 　

Each leaf was scanned and the projected area was analyzed with the public domain NIH Image program

(The U.S. National Institutes of Health, http://rsb. info.nih.gov/nih-image/). r indicates Pearson's correlation

coefficient for correlation of leaf area with leaf length and width.