Ephedra pedunculata

Ephedra pedunculata, common name Clap-weed, vine Mormon tea or Comida de Vívora, is a plant species native to southern Texas and to Mexico as far south as Zacatecas. It grows in sandy or rocky slopes and outcrops.
Most species of "Ephedra" (called "Mormon tea") are shrubs, but "Ephedra pedunculata" is a trailing or clambering woody vine up to long. Bark is gray, becoming cracked with age. Leaves are opposite, up to long. Microsporangial (pollen-producing cones) are 1–2 mm long, compared to less than 1 mm in many other species. Seed cones are long, each containing 2 ellipsoid seeds long.