A very serious problem in the Finger Lakes region, worse than the similar species C. louiseae. Seed pods are superficially similar to the native Asclepias spp. pods, with silky tassels to aid distribution. Hike upper Taughannock to see the ground covering stands of Cynanchum spp. Sale or transport of both pale and black swallowwort are prohibited in New York State.
Herbaceous Plants - Annuals, Biennials, Perennials