Cranwell, Lucy M. Department of Geosciences, University of Arizona, Tucson, Arizona.
Last reviewed:January 2021
- The individual grain
- Diagnostic characters
- Pollen record
- Related Primary Literature
- Additional Reading
The small male reproductive bodies produced in the pollen sacs of seed plants (gymnosperms and angiosperms) [Fig. 1]. The term comes unchanged from Latin, meaning fine dust or flour, and was popularized by Carl Linnaeus in 1751 (but used since 1523). Pollen is usually carried by wind or insects to the sticky stigmas of angiosperms or to the naked ovules of gymnosperms. Fertilization, which follows pollination within a wide time range—minutes, hours, a year in Agathis, 15 months or more in juniper, and 2 years in stone pine (Pinus pinea)—is usually effected only by pollen of the same species. See also: Flower; Plant reproduction
The content above is only an excerpt.
for your institution. Subscribe
To learn more about subscribing to AccessScience, or to request a no-risk trial of this award-winning scientific reference for your institution, fill in your information and a member of our Sales Team will contact you as soon as possible.
to your librarian. Recommend
Let your librarian know about the award-winning gateway to the most trustworthy and accurate scientific information.
AccessScience provides the most accurate and trustworthy scientific information available.
Recognized as an award-winning gateway to scientific knowledge, AccessScience is an amazing online resource that contains high-quality reference material written specifically for students. Contributors include more than 10,000 highly qualified scientists and 46 Nobel Prize winners.
MORE THAN 8700 articles covering all major scientific disciplines and encompassing the McGraw-Hill Encyclopedia of Science & Technology and McGraw-Hill Yearbook of Science & Technology
115,000-PLUS definitions from the McGraw-Hill Dictionary of Scientific and Technical Terms
3000 biographies of notable scientific figures
MORE THAN 19,000 downloadable images and animations illustrating key topics
ENGAGING VIDEOS highlighting the life and work of award-winning scientists
SUGGESTIONS FOR FURTHER STUDY and additional readings to guide students to deeper understanding and research
LINKS TO CITABLE LITERATURE help students expand their knowledge using primary sources of information