I grew Treasure of the Southwest way back in 2012. That unfortunately was the year of my one rust outbreak. Although it was a light case of rust on Treasure of the Southwest, it got pitched out along with many others. I wasn't taking any chances of rust overwintering in my moderate zone. However, I still remember it because it was so interesting. The color was a melange of pink, salmon, coral etc. that varied during the day. It was lovely and looked nice mixed with other daylily colors. I remember too that even though it was a first year plant, it bloomed remarkably well. I'd try it again if I had the room and a rust free source.
Maryl