I feel like a prince already, so there is no desire on my part to kiss the plant, testing the Aesop theory. Tricyrtis nana Confusion exists not only with the common name. Hortus Third says there are between ten and fifteen species of Tricyrtis . Hortus also states they are not reliably hardy north of zone 7. Hortus is far removed from fact when dealing with the hardiness, for in most cases Tricyrtis are hardy well into zone 5.
Specialty catalogs are probably the best source of information on culture and hardiness information.
Normally they will carry between three and five species or hybrids, describing their local experiences with each plant. In all fairness to botanists, the confusion is understandable. Tricyrtis are an East Asian group. Uncle Harry and I are related, but look nothing whatsoever like each other, but behave somewhat similarly I am told. So I will accept that one.