Pauridiantha includes ca. 45 species found widely in moist vegetation in tropical Africa, with one very widespread species that is also rather extensively distributed in moist vegetation in Madagascar. The genus is characterized by a shrub or small tree habit; opposite or occasionally verticillate leaves; triangular interpetiolar stipules that are persistent at least on nodes near the stem apex; axillary, cymose, bracteate inflorescences; small, bisexual, distylous flowers with 4-6 calyx lobes, corolla lobes, and stamens; salverform, generally white to yellow corollas with the lobes valvate in bud; ovaries with 2-4(6) locules and the ovules numerous in each locule; and fleshy red berry fruits with small angled seeds. On dried specimens the white corollas often acquire a distinctive orange or red color. Earlier authors included some of these species in the genus Urophyllum, but the separation of these genera has been clarified and Urophyllum is now found only in Asia.
The entire genus was studied by Ntore (2008) and the single species found in Madagascar, Pauridiantha paucinervis, was also studied in some detail by Ntore et al. (2003), who examined its morphological variation across its geographic range. Previous authors recognized three subspecies of Pauridiantha paucinervis or sometimes two species, Pauridiantha paucinervis and Pauridiantha holstii; one of the subspecies, Pauridiantha paucinervis subsp. lyalii, was found Madagascar with the other subspecies or species found in continental Africa. However Ntore et al. (2003) concluded that the features used to separate the subspecies are continuously variable and are not correlated with each other, and they did not recognize infraspecific taxa. This species is rather commonly collected in Madagascar.