Fig. 2

Morphological characteristics of the fruit of Firmiana simplex. a Pericarp projected area, seed number, total mass, and wing loading of the fruit with different lengths. Scattered points represent different fruit samples in each graph, and the straight lines are the linear fitting curves of the data. b The distribution of seed positions on the pericarp. Coloured circles represent the different seeds in the fruit. Hollow circles and solid circles correspond to seeds starting from the left and right sides of the pericarp along the long axis, respectively. c The curvature distribution of the pericarp surface. The ventral surface of the pericarp points inward