These are no longer called gloxinias but have been renamed Sinningias.
Florists Gloxinias were derived came from Brazil in 1785. The name Gloxinia speciosa was originally assigned in 1817 by Conrad Loddiges, an English Nurseryman, in honor of P.B. Gloxin of Strasburg, Germany. In 1825, the species was renamed, placing it in the correct genus, Sinningia. The modern Gloxinia is a hybrid from two Brazilian tropical species; Sinningia speciosa and Sinningia maxima.
It arose as a chance seedling raised by a Scottish gardener, John Fyfiana, in the nineteenth century. Source Facts on growing sinningias can be found here and here.
Closeup shot below.