Relationships between biomass and (a) number of flower heads per plant, (b) average number of fruits per flower head and (c) estimated total seed output per plant controlling for precipitation and nutrient availability at population origin.

<p>Close circles represent Chilean populations (Ch) whereas open ones refer to Spanish ones (S). Significant relationships are shown by continuous (Chilean populations) or discontinuous (Spanish populations) lines. For each relationship, r coefficient and its significance are shown (* < 0.05; ** <0.01; *** < 0.001).