Figure 2.

Diagram Illustrating the Viability of Seeds Obtained from Crosses between Monkeyflowers (Mimulus spp.) with Different Ploidy and Genomic Composition (Subgenomes Shown with Different Capital Letters).

Arrowheads indicate the recipient of pollen in each cross type. Seed viability was assessed as the proportion of germinated seeds and is qualitatively indicated with different degrees of arrow shading. The lightest shading corresponds to germination proportions less than or equal to 2%. Quantitative values for seed germination are given in Table 1.