Cronquist, Arthur New York Botanical Garden, New York, New York.
Barkley, Theodore M. Division of Biology, Kansas State University, Manhattan, Kansas.
Last reviewed:June 2016
Show previous versions
- Related Primary Literature
- Additional Reading
A former order of flowering plants, division Magnoliophyta (Angiospermae) of the class Magnoliopsida (dicotyledons), reassigned to the suborder Polygonineae in the order Caryophyllales. The order Polygonales was considered as an ordinal grouping in many previous taxon classifications. It consisted of the members of the family Polygonaceae, with more than 1000 species (see illustration), which are most abundant in north temperate regions. Present-day taxonomies have reassigned this group to the suborder Polygonineae in the order Caryophyllales. Members of the family Polygonaceae are characterized by the following features: a well-developed endosperm; an ovary with one chamber (unilocular) that is mostly tricarpellate with a single basal ovule, which is usually straight and has the micropyle at the opposite end from the stalk (orthotropous); and typically trimerous flowers, that is, with floral parts in sets of three, and usually two or three sets of stamens. Rhubarb (Rheum rhabarbarum) and buckwheat (Fagopyrum esculentum) are familiar members of this group. See also: Buckwheat; Caryophyllales; Magnoliophyta; Magnoliopsida; Plant kingdom; Rhubarb
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