I may be classifying my seedlings all wrong when I look at Maurice's explanation. But, I am not a scientist, far from it, so when I register a daylily as dormant, semi-evergreen or evergreen, I base it on my observations of the plant during the winter months. If it totally disappears, it gets classified as dormant. If it has a bit of green it is semi-ev, and if it has more green than normal, it is evergreen. Honestly, and I don't mean to be condescending to anyone, when I first got into daylilies 20 plus years ago, this was the way most people did classify them at that time. Whether the top hybridizers have changed their way of doing it, I really don't know as I am a very small scale grower compared to most.
