Fig. 4.

Phenology of a Delphinium glaucum inflorescence, including (A) the dynamics of display size and (B) the male-phase (blue lines) and female-phase (pink lines) periods of individual flowers (arranged from bottom to top according to position within the inflorescence). Later flowers did not produce gynoecia, so this plant was andromonoecious. Display size for a given date in (A) equals the sum of the open flowers (lines) in (B) on that date. In (A), the proportion of female flowers approximates the inflorescence's phenotypic gender, which changes during the flowering period. In (B), the declining slope of the left edge of the plot illustrates the slowing anthesis rate, and the lengths of the lines for an individual flowers depict their longevities.