H. 'Clear Fork River Valley'
This one came to me as part of a 'Secret Trade' from Port Hope, ON, and is one I am eager to see larger and more mature. The leaves show corrugation now, but it gets much more pronounced with maturity and is one of the best ranked for that.
The plant seemed to struggle a bit in 2011, likely because of drainage issues, and I decided to divide and re-pot. This is the larger of the 2 divisions. Hopefully I'll see some decent growth on it in 2012, I'd love to see a large specimen with all the corrugation.
Some more info in Hugo's Database.