Fig. 4

Assays were conducted to determine pollen limitation and pollinator dependency for this study. Effect of the number of pollen tubes in the style on seed set across the 15 plots examined (a). Effect of the pollination treatment (enclosed plants versus plants exposed to pollinators) on seed set (b). The number of pollen tubes in the style and seed set were averaged for each plot. Raw data, along with the standard errors of the predicted values for seed set, are included in the plots.