Silene seeds with black cardioid

Graphic compositions containing forty seeds for each seed population of <em>Silene </em>species elaborated with Corel PHOTO-PAINT X7. For the comparison of a group of seeds with the models and the quantification of <em>J</em> index, the geometric figures used as models were superimposed to each seed image in the group of forty, searching a maximum adjustment between both shapes, the seeds and the model. The cardioid in black is superimposed to 40 seeds in 21 species of <em>Silene</em>.