An evergreen shrub of warm, arid regions that has trailing or climbing stems and tiny, scalelike leaves. Some kinds are a source of ephedrine and are used medicinally.
- Family Ephedraceae and genus Ephedra.
- The vegetation is a mix of grasses, annual herbs and isolated patches of mesquite, cholla, ephedra and yucca.
- She had been taking a weight-loss product containing caffeine and the herb ephedra on-and-off for three years.
- But some featured other herbs containing ephedrine, the active ingredient in the herb ephedra.
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