Hello,
this plant is originally from Chen Yi nursery. It is fully hardy here in Austria. It overwinters as "bulb" above ground. In my garden it modestly seeds around.
At first I thought, that it might be C. hammata. But after seeing that plant in the International Rock Gardener I suspect, that ist must be something else.
It also makes hybrids here, I suppose with elata!
Has anybody an idea about its name?