<P> Vincetoxicum rossicum is a flowering plant of the milkweed family . It is a perennial herb native to southern Europe and is a highly invasive plant growing in all of the Eastern United States , in the mid west , and southern Ontario and Quebec in Canada . It has several common names including swallowwort , pale swallowwort , and dog - strangling vine . There has historically been much confusion about the genus it belongs to , with authors placing it within Vincetoxicum and others within Cynanchum , but recent molecular and chemical analyses have shown it to belong in the genus Vincetoxicum . </P>
<P> Vincetoxicum rossicum is a flowering plant of the milkweed family . It is a perennial herb native to southern Europe and is a highly invasive plant growing in all of the Eastern United States , in the mid west , and southern Ontario and Quebec in Canada . It has several common names including swallowwort , pale swallowwort , and dog - strangling vine . There has historically been much confusion about the genus it belongs to , with authors placing it within Vincetoxicum and others within Cynanchum , but recent molecular and chemical analyses have shown it to belong in the genus Vincetoxicum . </P>
where did the dog strangling vine come from
where did the dog strangling vine come from
native to southern Europe
native to southern Europe