Cynanchum is a genus  of about 300 species  including some 
swallowwort s, belonging to the family  Apocynaceae .  The taxon name comes from
Kaynak: CynanchumIt has several common names including 
swallowwort, pale 
swallowwort, and dog-strangling vine.  Characteristics: It is a twining vine that
Kaynak: Cynanchum rossicumspecies of flowering plant in the Cynanchum  genus of the dogbane family , known by the common names Utah 
swallowwort and Utah vine milkweed.
Kaynak: Cynanchum utahensedepressions between dunes, where the water is nearer the surface, some flora—including acacias, soapberry trees, capers, and 
swallowwort—may be found.
Kaynak: Geography of Mauritania