Figure S1 Quantity of pollen (average over the four measured anthers) produced by the first flowers that opened along the main floral stem, for all studied B. vulgaris ssp. maritima individuals. For individuals that flowered both in 2008 and 2009, the mean value over the both study years was calculated. Individuals are ranked according to the quantity of pollen per anther. Plants that were initially typed as females are represented in white, as hermaphrodites in grey. The dashed box contains all plants that were considered as females in statistical analyses (mean pollen quantity produced per anther in the first flowering week <7000 pollen grains).

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