Elizabete,
They probably have the warmer nights there in the valley during a heat wave. I just compared their current weather to ours and the overnight temps are the same. But I do try to find daylilies that are EMO, Early Morning Openers. When you compare pictures from the warm humid parts of the country to here, they all look different. We don't usually get as much ruffling and looping either. It's those warm humid nights that really bring out the best forms, in most cases. When you buy from the CA hybridizer's, you at least know it should perform well here!
I bought Bonnie Holley directly from the hybridizer, (known him for years) and it does the petal surface sculpting pretty nicely. I don't know why, but I can't find my pictures of it right now.
Are you in the local daylily club by any chance? Next meeting & auction is this month in Vacaville, on the 21st. It's been at least a year since I last went, we were always out of town. I kind of stopped collecting, no more room in my tiny yard but I now have a renewed interest, we are trying to buy a house in Sebastopol on 1/2 acre, sold mine 3 weeks ago.
My best EMO, Bob Carr's LIVING IN LUXURY, not sculpting but a bit of pleating & lots of looping ruffles. And it's a Florida bred daylily so I am thrilled to find one that looks like it's supposed to. It's coming with me!