It reminds me a bit of Golden Tiara which I had for many years, but not quite the same. I just bought this potbound one to divide heavily. I need something to hide neighbor's daffodil foliage that doesn't get cut down til the fall. I'm not sure its going to be tall enough. Golden Tiara would not be tall enough, but this seems a bit more upright.

The first picture gives the appearance of a larger hosta than it seems in person. The leaf portion is only about 3" long. Its in a 1 gallon pot.

I also want to know the name to figure out the spacing. I know Golden Tiara spread a lot! This pot is quite tight so I do think its a good grower.