This fine hybrid created by Alcie Maxwell has what is known as “calyx double” features. The calyx, rather than being the usual small leafy green structure, has morphed into a “tube” enveloping the corolla tube. The prominent calyx lobes then have the appearance of extra petals. This phenomenon is sometimes referred to as “tube-in-tube” or “hose-in-hose”, the latter implying pulling on two pairs of socks or nylons.
As seen in the feature photo above, this hybrid typically produces a very prominent tuber, most often allowed to grow above the soil level and become part of the display. Exhibited at the 2020 virtual show of the Gesneriad Society.
Additional photos can be seen in a slideshow by clicking one of the links below: