This spectacular specimen was exhibited at the 2016 convention of the Gesneriad Society. For scale, the pot is probably at least 8″ in diameter.
The beautiful flowers are born on a very long flowering stem. The flowers are very fragrant, as well as beautifully shaped and of a very clear white. Note the “keyhole” opening (more visible in the flower close-up below), which when taken with the white color, the fragrance and the length of the tube, indicates likely pollination by a moth with a long proboscis.
This species can be grown outdoors year-round in a warm-temperate climate, as the tubers will overwinter if the ground does not freeze solid to significant depth. The first linked image below is of such a bed, grown in a nominal climate zone of 6B, but which has more recently been closer to 8. No covering was applied to the soil. There are typically multiple days of frost during the winter.
Additional photos may be seen in a slide-show by clicking one of the links below.