Funastrum cynanchoides (formerly called Sarcostemma cynanchoides), fringed twinevine or climbing milkweed, is a perennial plant in the Dogbane Family (Apocynaceae) that grows twining through other plants in the Mojave Desert and Colorado Desert. It has milky sap and smells pungent. It is similar to Funastrum hirtellum. Its narrow, arrowhead shaped leaves are opposite and 1" to 1 1/2" long. Flowers. Flowers are pink to purplish, and are produced in umbrella-like heads (umbels. Fruits. It has a fruit that is 3" to 4" long, with tufted seeds about 1. 4" long.