Unknown Plant (Identified as Arum italicum 'Pictum')

I have a plant in the yard I can't identify. It stayed green all winter even with snow on the ground and the clumps are growing taller and wider now. 

Love these plants. They look so much like caladiums but the bulbs are very different. 

It has started putting up blooms much like the Peace Lilly and several other plants. 

This is what the bulbs look like. 

This was taken in March. 

These were taken in April when it started putting out a lot of new growth. 

This was taken the first of May

Taken today may 16, 2014