Metteniusa is a genus of flowering plants in the family Metteniusaceae.

[2] It was named by Hermann Karsten in 1860 for the German botanist Georg Heinrich Mettenius.

[4] The type species is Metteniusa edulis.[5].

"Metteniusaceae" was proposed by Adalbert Schnizlein and validated by Hermann Karsten in 1860.[6].

The family is now placed in its own order, Metteniusales[2].