Pandora's Box is a very good example of a daylily that was hybridized in a climate with mild winters (Florida) and that was registered as an evergreen (meaning that it might keep some green leaves during mild winters) but that grows showing that it goes winter dormant (meaning that it creates a bud from which it will sprout) in cold winter climates. I have added white arrows (to one of Heidi's photos) pointing to the small outer leaves that are an indication that 'Pandora's Box' sets buds and then sprouts from those buds in the next spring.
In the case of 'Pandora's Box' the entire sprout in the spring indicates that it was winter dormant and sprouts from buds rather than simply continuing to grow from where it had stopped growing the previous autumn.
