''Xantonneopsis'' is a genus of plants in the family

Rubiaceae Rubiaceae () is a family (biology), family of flowering plants, commonly known as the coffee, madder, or bedstraw family. It consists of terrestrial trees, shrubs, lianas, or herbs that are recognizable by simple, opposite leaves with Petiole ( ...

. It contains only one known species, ''Xantonneopsis robinsonii'',

native Native may refer to: People * '' Jus sanguinis'', nationality by blood * '' Jus soli'', nationality by location of birth * Indigenous peoples, peoples with a set of specific rights based on their historical ties to a particular territory ** Nat ...

Vietnam Vietnam, officially the Socialist Republic of Vietnam (SRV), is a country at the eastern edge of mainland Southeast Asia, with an area of about and a population of over 100 million, making it the world's List of countries and depende ...

. The genus has been placed in the tribe

Coffeeae Coffeeae is a tribe of flowering plants in the family Rubiaceae and contains about 333 species in 11 genera. Its representatives are found in tropical and southern Africa, Madagascar, the western Indian Ocean, tropical and subtropical Asia, and ...

, but a transfer from that tribe to

Octotropideae Octotropideae is a tribe of flowering plants in the family Rubiaceae and contains about 103 species in 18 genera. Its representatives are found in the paleotropics. The genera previously placed in the tribe Hypobathreae are now placed in Octotrop ...

was suggested in 2007 on the basis of combined molecular and morphological evidence.

References

Monotypic Rubiaceae genera Ixoroideae Endemic flora of Vietnam {{Ixoroideae-stub