| European swallowwort |
USDA PLANTS Symbol: CYRO8 USDA ARS GRIN: 448793 ITIS: 501902 |
| Cynanchum rossicum (Kleopov) Barbarich | |
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Taxonomic Rank: Magnoliopsida: Gentianales: Asclepiadaceae |
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| Synonym(s): pale shallow-wort | |
European swallowwort is an herbaceous, twinning, long-lived perennial vine. Leaves are opposite, dark green, oval, shiny, 3-4 in. (7.6-10.2 cm) long and 2-3 in. (5.1-7.6 cm) wide. Flowering occurs in June to July, when pink to reddish, 5-petaled, star-shaped flowers appear in clusters. Flowers are approximately 0.25 in. (0.6 cm) across and are covered with white hairs. Fruit are pods, similar to milkweed pods, which are slender, 2-3 in. (5.1-7.6 cm) long and split to reveal small seeds with tufts of white hair. The hair allows the seeds to be readily dispersed. European swallowwort invades upland areas with a wide range of light and moisture conditions. European swallowwort is native to Europe and was likely introduced into the United States for ornamental purposes. |
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Identification, Biology, Control and Management Resources
- Weeds Gone Wild: Alien Plant Invaders of Natural Areas - Plant Conservation Alliance
- Weed of the Week - USDA Forest Service
- Element Stewardship Abstract - The Nature Conservancy
- Invasive Plant Atlas of New England - University of Connecticut
- Biological Control of Invasive Plants in the Eastern United States - USDA Forest Service
| Selected Images from Invasive.org | View All Images at Invasive.org |
 Feature(s); Comparision of flowers of Cynanchum louiseae (top) and Cynanchum rossicum (bottom) Leslie J. Mehrhoff, University of Connecticut, Bugwood.org Additional Resolutions & Image Usage |
 Flower(s); Leslie J. Mehrhoff, University of Connecticut, Bugwood.org Additional Resolutions & Image Usage |
 Flower(s); Leslie J. Mehrhoff, University of Connecticut, Bugwood.org Additional Resolutions & Image Usage |
 Fruit(s); Leslie J. Mehrhoff, University of Connecticut, Bugwood.org Additional Resolutions & Image Usage |
 Seed(s); Close-up of fruit with seeds Leslie J. Mehrhoff, University of Connecticut, Bugwood.org Additional Resolutions & Image Usage |
 Plant(s); Leslie J. Mehrhoff, University of Connecticut, Bugwood.org Additional Resolutions & Image Usage |
 Infestation; Leslie J. Mehrhoff, University of Connecticut, Bugwood.org Additional Resolutions & Image Usage |
 Infestation; Leslie J. Mehrhoff, University of Connecticut, Bugwood.org Additional Resolutions & Image Usage |
Taxonomic References:
- USDA, NRCS. 2001. The PLANTS Database, Version 3.1, National Plant Data Center, Baton Rouge, LA 70874-4490 USA.
Invasive Listing Sources:
- Faith Campbell, 1998. Plants that Hog the Garden: Invasive Plants in the United States. Fine Gardening Online
- Hoffman, R. & K. Kearns, Eds. 1997. Wisconsin manual of control recommendations for ecologically invasive plants. Wisconsin Dept. Natural Resources, Bureau of Endangered Resources. Madison, Wisconsin. 102pp.
- Invasive Plant Council of New York State
- John Randall, The Nature Conservancy, Survey of TNC Preserves, 1995.
- New Hampshire Invasive Species Committee. 2005. Guide to Invasive Upland Plant Species in New Hampshire. New Hampshire Department of Agriculture, Markets and Food Plant Industry Division and New Hampshire Invasive Species Committee.
- WeedUS - Database of Plants Invading Natural Areas in the United States
- Connecticut Noxious Weeds
- Massachusetts Noxious Weeds
- Massachusetts Noxious Weeds
- New Hampshire Noxious Weeds
- New Hampshire Noxious Weeds
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