The genus Gloxinia is comprised of three species, all of which produce flowers on a raceme. Although they are otherwise quite different (especially in the size of the plants and flowers), recent phylogenetic studies have confirmed their affinity for one another.
Many species formerly lumped within this genus have been transferred elsewhere. In particular, a cluster of species with mainly red tubular flowers have been transferred to the genus Seemannia. While they have some affinity with Gloxinia, they are more closely related and similar to each other than to the species clearly within Gloxinia.
Gloxinia erinoides was previously known as Koellikeria erinoides. Gloxinia xanthophylla was formerly known as Anodiscus xanthophyllus.
Gloxinella and Gloxiniopsis are genera with some apparent affinity for Gloxinia. However, neither is in fact closely related to this genus, and they are included in their own genus page, along with Monopyle (here).
