The whitish central mark on the foliage of T. ichangense
from Crûg Farm might be only that variety or form they have (?)
I received this as Thaictrum ichangense
. But it has now been identified as T. koreanum
, because it is both tuberous and
rhizomatous. (Thanks Aaron F.!) Even when young, the leaves have no such markings. It is really quite a forgiving plant for me. In my earlier and more ignorant years as a gardener, I had it growing in full sun in a dry garden, and even there it survived for many years, although just barely. But as you would expect, it does best in part shade or shade with ample moisture.