Seed images and curvature values in the seed peduncle of wild-type cultivars (Sylvestris group): a. CA 13.4 seed in a frontal view, two maximum points of curvature are observed; b. A slight displacement of the point of view in seeds of the same cultivar results in a unique maximum curvature point; c. Images of a peduncle with two points of slightly different curvature values; d. A point with maximum curvature and a shoulder.