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Description:This is a scanning electron microscopic (SEM) image of an Ambrosia trifida plant, or more commonly known as ragweed. See PHIL 243, for a colorized version of this image.
When ragweed pollen is disbursed, many people have a reaction, but because they don't see the tiny flowers on the ragweed, they assume it's the pollen from the larger flowered goldenrod, which blooms at the same time. Note the dispersed pollen granules.
High Resolution: Click here for hi-resolution image (1.42 MB)
Content Providers(s):CDC/ Janice Haney Carr
Creation Date:
Photo Credit:Janice Haney Carr
CDC Organization
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Copyright Restrictions:None - This image is in the public domain and thus free of any copyright restrictions. As a matter of courtesy we request that the content provider be credited and notified in any public or private usage of this image.