Arisaema nepenthoides

(Wall.) Mart. 1824

It belongs to the section Nepenthoidea and it is native to Japan.
I bought a mature tuber (about 5 cm of diameter) in 2007.

It moved in the beginning of May	On 15 May it bloomed. It was 60 cm tall.
It had only one male flower, the rest were female.
On 1st June the leaves (always 2) were fully developed. They have a little reddish underside.