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SEM image of pollen grains from a variety of common plants: sunflower (Helianthus annuus), morning glory (Ipomoea purpurea), hollyhock (Sidalcea malviflora), lily (Lilium auratum), primrose (Oenothera fruticosa), and castor bean (Ricinus communis). Pollen, sometimes incorrectly called flower sperm, is a fine to coarse powder consisting of microgametophytes (pollen grains), which produce the male gametes (sperm cells) of seed plants. Each pollen grain contains vegetative cells (only one ...
Wikipedia - [full article]
Pollen Organizations
- National Women's Health Information Center http://www.4woman.gov/
- Office of Communications, NIAID, NIH, HHS
- American Academy of Allergy, Asthma and Immunology http://www.aaaai.org/
- Asthma and Allergy Foundation of American http://www.aafa.org

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