Soda oppositifolia is a species of halophyte shrub native to the Mediterranean Basin.

[1] This annual, woody plant can grow into shrubs up to 2 m tall.

The flowers, which bloom from May to October, are hermphrodyte and have a size of 1 cm.

[2] Salsola oppositifolia was first described by René Louiche Desfontaines and published in Flora Atlantica 1: 219.

[3] This plant has been historically used, along with other Soda species, as a source of soda ash, in the manufacture of lye and soaps.