European swallowwort |
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| Gentianales > Asclepiadaceae > Cynanchum rossicum (Kleopov) Barbarich
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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. |
Identification, Biology, Control and Management Resources
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Selected Images from Invasive.org
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Feature(s); Comparision of flowers of Cynanchum louiseae (top)
and Cynanchum rossicum (bottom)
Leslie J. Mehrhoff, University of Connecticut, Bugwood.org
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Flower(s);
Leslie J. Mehrhoff, University of Connecticut, Bugwood.org
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Flower(s);
Leslie J. Mehrhoff, University of Connecticut, Bugwood.org
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Fruit(s);
Leslie J. Mehrhoff, University of Connecticut, Bugwood.org
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Seed(s); Close-up of fruit with seeds
Leslie J. Mehrhoff, University of Connecticut, Bugwood.org
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Plant(s);
Leslie J. Mehrhoff, University of Connecticut, Bugwood.org
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Infestation;
Leslie J. Mehrhoff, University of Connecticut, Bugwood.org
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Infestation;
Leslie J. Mehrhoff, University of Connecticut, Bugwood.org
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Invasive Reference(s):
Check Invasive.org for most current lists.
- Connecticut - Noxious Weed Law
- Massachusetts - Noxious Weed Law
- New Hampshire - Noxious Weed Law
- Invasive Plant Atlas of New England
External Links
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