Ephedra distachya (syn. E. vulgaris) is a shrub in the family Ephedraceae, about 25 cm to 50 cm high, that grows in southern Europe and parts of western and central Asia. Its local names include somlatha.
Ephedrine, the salt of an alkaloid, is obtained from its dried branches and is used as a stimulant, often to control asthma. It was isolated from the plant by Nagayoshi Nagai in 1885. All parts of the plant contain up to 3% ephedrine.