Dolichostachys

Dolichostachys is a monotypic genus of plants in the family Acanthaceae. Its sole species, Dolichostachys elongata, is a subshrub that is endemic to Madagascar. It is considered an endangered species.

==Taxonomy and history== The genus Dolichostachys and species Dolichostachys elongata were named and described by Raymond Benoist in 1962 based on two specimens collected by Joseph Marie Henry Alfred Perrier de la Bâthie in 1912. However, as Benoist failed to designate a type specimen, neither the genus nor species names could be considered validly published under Article 40 of the International Code of Nomenclature for algae, fungi, and plants. Benoist's description was verified and a type specimen was designated in a 2022 article published in the journal Taxon, with the author citation attributed to Benoist.