Arum pictum, was Tropaelum azureum etc.
Pacific Rim (Wed, 16 Dec 2009 13:35:40 PST)

Hi, Jim. I know that the top freezes. I don't know whether the tuber --
corm -- underground storage organ freezes.

Once they are damaged by cold, the leaves deliquesce, mineralize, become
compost. They might freeze and thaw a few times in a short period, but they
are gone quite soon. They don't hang on all winter.