Scanning electron microscope image of pollen from Ipomea purpurea (Heavenly blue morning glory). This image is in the public domain. https://remf.dartmouth.edu/images/botanicalPollenSEM/source/4.html

Scanning electron microscope image of pollen from Ipomea purpurea (Heavenly blue morning glory). This image is in the public domain. http://remf.dartmouth.edu/images/botanicalPollenSEM/source/4.html