Interpretative line drawing showing synangiate pollen organs on fertile axes of Cosmosperma polyloba. (a) Anisotomous fertile rachises with terminal pollen organs in Fig. 7a. Conical prickles sparsely located along the fertile rachises sparsely. (b, c) Two stages of dĂŠgagement on pollen organs in Fig. 7d, e, respectively. (TIFF 1395Â kb