FIGURE 3 in Chichimecactus (Cactoideae, Cactaceae), a new genus based on molecular characterisation of highly endangered Strombocactus species

FIGURE 3. SEM of the seeds of Chichimecactus and Strombocactus. A, B and C from C. corregidorae. D, E and F from S. disciformis subsp. disciformis. A. Overall appearance of a seed. B. Close up of the hilum-micropilar region (HMR) showing the lack of strophiole. C. Close up of the rugose testa towards the HMR. D. Overall appearance of a seed. E. Close up of the HMR showing the structure of the strophiole. F. Close up of the testa towards the HMR. SEM by María Berenit Mendoza Garfias and illustration by Rolando T. Bárcenas.