Cronquist, Arthur New York Botanical Garden, New York, New York.
Barkley, Theodore M. Division of Biology, Kansas State University, Manhattan, Kansas.
Last reviewed:January 2021
Show previous versions
- Related Primary Literature
- Additional Reading
An order of flowering plants, division Magnoliophyta (Angiospermae), in the subclass Magnoliidae of the class Magnoliopsida (dicotyledons). The order Papaverales consists of two families: Papaveraceae, with approximately 200 species; and Fumariaceae, with about 400 species. Within its subclass, the order is marked by its syncarpous gynoecium, parietal placentation, and only two (seldom three) sepals. Most of the species are herbaceous, and many of them contain isoquinoline alkaloids similar to those in the order Ranunculales. The family Papaveraceae, with regular flowers, numerous stamens, and a well-developed latex system, includes the poppies (Papaver and related genera; see illustration), bloodroot (Sanguinaria), and celandine (Chelidonium). Papaver somniferum is the source of opium. The family Fumariaceae, with four or six stamens, irregular flowers that usually have some of the petals spurred or saccate, and no latex system, includes the bleeding heart [Lamprocapnos (Dicentra) spectabilis] and some other common ornamentals. See also: Magnoliidae; Magnoliophyta; Magnoliopsida; Opiates; Poppy
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