|'Mountain Snow' creates a large vase-shaped mound of white-margined foliage. The white often jets into the plant leaf randomly following certain veins to the center vein itself, and young new growth often shows much more white. The size is 60 x 27" with 40" flower scapes. The flowers are fertile and pale lavender in color. The leaves are ovate and have good substance. The hosta originated as a tissue culture sport of an ordinary green form of montana at T and Z Nursery. The white margins are much narrower than montana 'Aureomarginata'. It was registered in 1988 and emerges late in the growing season.