photo: Leslie J. Mehrhoff, University of Connecticut, Bugwood.org
Black Swallow-wort (Cynanchum louiseae)
 Leslie J. Mehrhoff, University of Connecticut, Bugwood.org |
 Leslie J. Mehrhoff, University of Connecticut, Bugwood.org |
 Leslie J. Mehrhoff, University of Connecticut, Bugwood.org |
 Leslie J. Mehrhoff, University of Connecticut, Bugwood.org |
Form:
Perennial twining vines, 3 to 6 feet, wide variety of moisture and light conditions.
Leaves:
Opposite, 2 to 4 inches long, oblong to oval, pointed tip, glossy, hairless, margins entire.
Flowers:
June to September, borne in leaf axils, about 0.25 inches wide; 5 dark purple, downy petals
Fruits & Seeds:
Summer; green to brown pods, 1.5 to 3 inches long; resemble smooth milkweed pods.
Roots:
White, fibrous rhizomes.
Similar Species:
Honeyvine (Cynanchum laeve)
Tier 1 - Early Detection/Rapid Response
These species are known to be highly invasive in natural areas, but are not yet widespread in Cleveland Metroparks. With Limited distrabution, immediate action will minimize management cost and long-term ecological impact of these aggressive species.
Action: A GPS point is taken and the Invasive Plant Coordinator should be notified, so the Invasive Plant Management Crew can respond accordingly.
