Citrus undulata

Citrus undulata, synonym Oxanthera undulata, the wavy-leaf oxanthera, is a species of plant in the family Rutaceae. It is endemic to New Caledonia.
Oxanthera undulata is classified as critically endangered by the IUCN.

Taxonomy

Originally characterized and named as Citrus undulata by André Guillaumin in 1938, this species along with the other false oranges were moved to a novel genus, Oxanthera, in the Swingle and Tanaka systems of citrus taxonomy. Phylogenetic analysis showed that Oxanthera species clustered within Citrus, which makes this species a member of that genus.