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Representative patterns of variation in herkogamy in three genotypes of Eichhornia paniculata grown under the same environmental conditions in a glasshouse (low stress, see Materials and Methods for details). Genotypes B191-5-1 and B182-9-1 (A and C, respectively) illustrate unimodal distributions of herkogamy values whereas B189-7-1 (B) exhibits developmental instability in herkogamy resulting in a bimodality of stigma–anther values.
