Here is a picture of my leaves of B. calthifolia, mine look as if they have a more leathery look. Never seen this plant before so nothing to compare with. The foliage is lovely when new.
Hope the picture is good enough.
Thank you for the pictures, it's the same plant that I grow. It looks (and behaves) quite different from those B. calthifolia I've seen in Sichuan and Yunnan, although to be honest I'm not at all sure what it is... Googling
Beesia deltophylla brings up a lot of pictures identical to your plant, but that species is only found in a very remote area of S Tibet, and the
herbarium sheets (2) are clearly different. Maybe its true identity is found among some of the synonyms listed in the FoC; B. cordata or B. elongata?