Fig. 7
From: Unraveling the development behind unisexual flowers in Cylindropuntia wolfii (Cactaceae)
Cylindropuntia wolfii fruit and seed development. A) Fruits of female (left) and male (right) individuals. Aborted ovules are found in fruits of both female (B) and male (C) individuals (red arrows), however, fruits of female individuals also form some mature seeds (black arrow). D-F) Mature seeds from fruits of female individuals showing the thick funicular coat. D) Seed with abnormal development that lacks the white solid embryo as shown in E-F. The latter shows a mature seed with endosperm consumed by the fully developed embryo and remaining perisperm (arrow). The figures are our own, collated by Adobe Photoshop