Appendix S1. Mean sex ratio and life history characteristics of the 243 species used in the cross species and phylogenetically controlled comparative analyses.

Appendix S2. Complete reference list of studies used in the comparative analyses of sex-ratio variation.

Appendix S3. Least significant differences among groups (LSD) for the generalized linear model (GLM, logistic regression) analyses of the effect of growth form, clonality and pollen and seed dispersal vectors on sex-ratio variation.

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