30; see text Averia Leonard (1940) Tetramerium is a genus of plants belonging to the family Acanthaceae.

It is found in the Americas,[2] ranging from the southwestern United States to Bolivia,[1] especially in tropical dry forests.

[3] Christian Gottfried Daniel Nees von Esenbeck first described the genus in 1846 after collecting two species (T. polystachyum and T. nervosum) on the journey of HMS Sulphur.

[3][4] 30 species are accepted.

[1] This Acanthaceae article is a stub.