Did You Know? The Truth About The Poinsettia

December 02, 1998

ST. PAUL, MN (December 1, 1998) -- Poinsettias, Christmas blooming masterpieces, are commonly found in North American homes during the holiday season. But did you know that poinsettias are tropical plants that originated in Central America and tropical Mexico? They grow as unbranched trees as high as 10 feet tall. Beloved by the Aztecs of Mexico as a symbol of purity; Joel Robert Poinsette, first United States Ambassador to Mexico and renowned botanist, introduced them into the United States in 1825.

How was a tropical tree transformed into the beautiful, branched plants we find in today's florist shops and stores? "Special seedling cultivars were first introduced in 1923," says Ing Ming Lee, USDA plant pathologist and member of the American Phytopathological Society. "Until recently we've never known what gave poinsettias their bushy, branched appearance. At first we thought a virus was involved, but the latest laboratory tests confirm the dwarf branching habit of the poinsettia is caused by a type of bacteria called a phytoplasma. Although highly unusual, its effects are spectacular in this plant."

Here are some additional poinsettia tips from the Plant Doctors this holiday season:
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Happy Holidays from the Plant Doctors at the American Phytopathological Society. For more details on this fascinating subject visit our December feature with photographs and links to additional sites of poinsettia interest at www.scisoc.org. The American Phytopathological Society (APS) is a professional scientific organization dedicated to the study and control of plant disease with 5,000 members worldwide.



American Phytopathological Society

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