Key for Gloxinia L'Hér.

1	Leaves opposite, petiole 1.4-12 cm long, blade truncate, rounded to cordate at base; calyx lobes ovate to oblong, seldom lanceolate; corolla broadly campanulate Gloxinia perennis
1'	Leaves in whorls (only rarely opposite), petiole usually 1 cm long, blade acute or cuneate at base; calyx lobes lanceolate; corollas cylindric to ventricose Gloxinia purpurascens