This is one of those cases where there are several hostas with the same name. One is registered and, therefore, the "official" version of H. 'Monet' while the others are non-registered plants and need to be renamed to avoid further confusion.

Mark Zilis of Illinois registered this tissue culture sport of H. 'Indigo' in 2011. The slow growing, small size plant is about 10 inches high with a spread of around 20 inches. Its intensely blue-green leaves have a chartreuse medial (center) variegation which lightens as the season progresses. The leaves are flat, lance shaped, moderately wavy and glaucous on top and bottom. Near white, tubular flowers bloom from July into August.

Hosta Helper will call this plant 'Monet' (Zilis)

This cultivar is a seedling of H. 'Artist's Palette' originated by Alex Malloy of New York. It is a small size hosta with green foliage that has white streaked variegation. It will need to be renamed.

Hosta Helper will call this plant 'Monet' (Malloy)

At one time, Mildred Seaver of Massachusetts had a hosta named 'Monet', however, According to The Hostapedia by Mark Zilis (2009), "During the 1995 National Convention of The American Hosta Society in Virginia, I learned Mildred had changed the name to 'Allen C. Haskell'."

Hosta Helper will call this plant 'Monet' (Seaver)

Originated by Jocelyne Bastille of Aux Mille Hostas in Canada, this non-registered cultivar is of unidentified parentage. It is a large size hosta about 28 inches high with green foliage. The leaves are slightly corrugated, wavy and curved at the tip. Its flowers are very pale lavender with darker stripes.

Hosta Helper will call this plant 'Monet' (Bastille)