Recently, I came upon this unique and attractive oddity as I was touring a client garden installed a couple of years ago. This was bought and installed as Hosta 'Sum and Substance', follow the link for photos. This is normally a bold large-leaved variety with solidly-colored chartreuse foliage. Solidly-colored foliage, I say. Not a lusciously mottled variegation of deep rich green and luminous chartreuse.
What will it look like next year? Will it be stable? I'll definitely be keeping my eye on it. Where's this beauty located? I'll never tell.
UPDATE: Conversation with@JoshSpece on Twitter confirms that this hosta is a victim of Hosta Virus X. I've seen hostas stricken with the virus before but they usually look weak, wilty and/or puckered. This one's foliage was quite smooth and, I dare say, very attractive. Be sure to follow to the link to Josh's excellent post on the topic.
In the meantime, it's off to the trash heap for this one. DO NOT compost infected plants as it will lead to risk of spreading the virus. Josh tells me via twitter that you may replant a new, uninfected hosta in the same position if you're absolutely certain that you've gotten the entire plant removed, roots and all. So it might be best to wait a year or so, so that any remaining roots have a chance to decompose.