Ragweed (Ambrosia sp.) pollen grains (green) sticking to an anther, scanning electron micrograph (SEM). Pollen grains are reproductive structures prod

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Ragweed (Ambrosia sp.) pollen grains (green) sticking to an anther, scanning electron micrograph (SEM). Pollen grains are reproductive structures produced by the male parts of flowering plants. Ragweed releases million pollen grains per hour, which are highly allergic and a major contributor to hayfever.

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Size: 5120px × 3413px
Photo credit: © MARTIN OEGGERLI/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

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