Mixed model analysis of the effects of pollination treatments and drought stress on seedling survival and length of the longest leaf.

Pollination treatment was partitioned into two orthogonal contrasts: Open pollination vs. hand pollination and hand-selfed vs. hand-crossed. Variation in leaf length was analysed using a linear mixed model, while a generalized mixed model with a binomial error structure and a complementary log-log link was fitted to analyse the proportion of seedlings that survived until the end of the experiment (see Materials and methods).