''Cynanchum angustifolium'' is a plant species. Commonly known as the Gulf coast swallow-wort, it is a perennial dicot that grows in the southern United States as far west as Texas. It is in the '' Cynanchum'' genus and ''

Apocynaceae Apocynaceae (from ''Apocynum'', Greek for "dog-away") is a family of flowering plants that includes trees, shrubs, herbs, stem succulents, and vines, commonly known as the dogbane family, because some taxa were used as dog poison Members of the ...

'' family. A flowering vine, it produces white blossoms with greenish and yellow parts. A member of the milkweed family, it is a plant host for monarch butterflies and produces wind dispersed seed pods.

References

angustifolium Flora of Texas {{Apocynaceae-stub