''Scyphostegia borneensis'' is a species of shrub or small tree endemic to Borneo. This unusual plant is the only species in the genus ''Scyphostegia''. In many taxonomic classifications the genus was placed in its own family, the Scyphostegiaceae. Analyses of DNA data indicated that the species is related to a group of species of the now defunct

Flacourtiaceae The Flacourtiaceae is a defunct family of flowering plants whose former members have been scattered to various families, mostly to the Achariaceae and Salicaceae. It was so vaguely defined that hardly anything seemed out of place there and it beca ...

, a group which is now placed in a broadly circumscribed

Salicaceae The Salicaceae is the willow family of flowering plants. The traditional family (Salicaceae ''sensu stricto'') included the willows, poplar, aspen, and cottonwoods. Genetic studies summarized by the Angiosperm Phylogeny Group (APG) have greatly ...

References

Salicaceae Monotypic Malpighiales genera Salicaceae genera {{Salicaceae-stub