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10 Asteraceae Helian Pollen
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10 Asteraceae (Helian.) Pollen

March 6, 2013
Scanning electron microscope image of pollen grains from Helianthus annuus (common sunflower). Asterales Asteraceae (daisy) family Helianthus annuus Zeiss DSM 962 SEM Credit: Louisa Howard, Charles Daghlian


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