No geographic cline in host-plant probability of having already flowered at a given size.

Results of multiple logistic regressions explaining the probability of L. a. africana having reached sexual maturity as a function of the geographic distance to the southern edge of the range of the Leonardoxa system, controlling for the effect of tree size (measured either as diameter at the trunk base or as total height). χ22: likelihood-ratio statistic of the model, byi: partial regression coefficient (±Standard Error), N = 402 trees from six populations (see Table S2 for details on samples).