Funastrum cynanchoides (formerly called Sarcostemma cynanchoides), fringed twinevine, twining milkweek or climbing milkweed, is a perennial plant in the Dogbane Family (Apocynaceae) that grows twining through other plants in the Mojave Desert and Sonoran Desert. It has milky sap and smells pungent. It is similar to Funastrum hirtellum.