Wildflowers of Toronto's High Park​​

Swallow-wort, pale  or  Dog-strangling vine
​Cynanchum rassicum

​Family: Dogbane
Introduced and invasive
Perennial

Blooms: June to September
Habitat: Waste areas and open forest

Flowers in loose clusters. 

Twining stem up to 2 m chokes out vegetation on which it climbs.

​Genus name means "dog-strangling" since the dense tangled stems could strangle a dog that tried to run through them













​Seed pods, 4-6 cm, release many small seeds with long silky parachutes, dispersed by wind.

​Plant also reproduces by spreading underground rhizomes.



























​Leaves in spring.
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