This looks really close to a daylily that I have from Apps-Blew. It is called
Happy Enchantment. But it is not evergreen. Your height matches my height. I get more blooms than I can count, probably more than any daylily I have seen. But my bloom is also smaller than registered but not as small as yours. You would have to Google for pictures there are none on the database. Many blessings to you on your search!