Fig. 2

Fruits, normal seeds and abortive seeds of Davidia. a The intact fruits; b Fruits with sarcocarp removed; c-i Crosscutting sections of the kernels. The fruits contain 1 to 7 normal seeds are displayed in turn; j A normal seed in fruit; k An abortive seed in fruit; l Normal and abortive seeds collected from identical fruit. The fruit has 3 normal seeds and 3 abortive seeds; m Normal and abortive seeds collected from identical fruit. The fruit has 1 normal seeds and 6 abortive seeds. Normal and abortive seeds are represented by yellow and red arrows, respectively