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(a) Plant height contrasts for 13 selfing and outcrossing pairs (some points overlap), where each pair consists of the median value of the selfing and outcrossing species within one family. (b) Flower size contrasts for 14 selfing and outcrossing pairs. (c) Seed size constrasts between 14 selfing and outcrossing pairs. (See Appendix A for list of families and species).
