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

Euphorbiaceae Euphorbiaceae (), the spurge family, is a large family of flowering plants. In English, they are also commonly called euphorbias, which is also the name of Euphorbia, the type genus of the family. Most spurges, such as ''Euphorbia paralias'', ar ...

first described as a genus in 1938. It contains only one known species, ''Neoguillauminia cleopatra'',

endemic Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also foun ...

New Caledonia New Caledonia ( ; ) is a group of islands in the southwest Pacific Ocean, southwest of Vanuatu and east of Australia. Located from Metropolitan France, it forms a Overseas France#Sui generis collectivity, ''sui generis'' collectivity of t ...

.Kew World Checklist of Selected Plant Families
/ref> Its closest relative is ''

Calycopeplus ''Calycopeplus'' is a plant genus of the family Euphorbiaceae first described by Jules Émile Planchon as a genus in 1861.Australia Australia, officially the Commonwealth of Australia, is a country comprising mainland Australia, the mainland of the Australia (continent), Australian continent, the island of Tasmania and list of islands of Australia, numerous smaller isl ...

.Horn, J. W., B. W. van Ee, J. J. Morawetz, R. Riina, V. W. Steinmann, P. E. Berry, and K. J. Wurdack. (2012) Phylogenetics and the Evolution of Major Structural Characters in the Giant Genus Euphorbia L. (Euphorbiaceae).” Molecular Phylogenetics and Evolution 63 (2): 305–26. Neoguillauminia cleopatra MHNT

References

Euphorbieae Endemic flora of New Caledonia Monotypic Euphorbiaceae genera Taxa named by Henri Ernest Baillon Taxa named by Léon Croizat {{Euphorbiaceae-stub