Unknown Hosta

It was hot, so this evening, while watering some pots, a few of the hostas got wet as well. The water drops beaded onto the enormous leaves of this plant. I do wish I knew its name---lost somewhere, tag raked up or buried under mulch. This leaf is a good 10x10 inches, the whole plant measures more than four feet across and it’s blooming with white flowers. I would have guessed ‘Frances Williams,’ but it is a little early for her to be in full bloom. It’s a tough plant as several of the hostas around it are showing slug and snail damage, while the leaves of this one are intact.