Stenostephanus is a genus of plants in the family Acanthaceae.

It includes 94 species native to the tropical Americas, ranging from northeastern Mexico to Bolivia and southeastern Brazil.

[1] Species accepted by the Plants of the World Online as of January 2024:[1] Many genera are now considered synonyms of Stenostephanus.

[1] Kalbreyeriella, first described in 1922, was named in honour of Guillermo Kalbreyer (1847–1912), a German plant collector who was sent by James Veitch & Sons of Chelsea, London to collect new plants in West Africa and South America.

[2] This Acanthaceae article is a stub.