Sources of variation in reciprocal herkogamy in the distyly floral syndrome of Linum tenue (Linaceae)

<p>Distyly is a floral polymorphism involving reciprocal herkogamy shaped by selection for pollen transfer efficiency. The variation of the floral organs involved in pollen transfer can be individually affected by environmental and genetic sources of variance, but the organ development will be canalized to minimize reciprocal inaccuracy between anthers and stigmas, as this is the focus of selection. We measured floral organ and cell length of both morphs of distylous <em>Linum tenue</em> (Linaceae) at different developmental stages of field- and glasshouse-grown plants. We analyzed the results to measure reciprocal inaccuracy and identify sources of variance.</p>