Hemerocallis citrina

The plant shown above was purchased as Hemerocallis citrina, and it might very well be that species. Yet in some respects it differs from plants grown under that name in the past. This most recent acquisition has a very short flower life: the flowers open at dusk and are already closing at the first hint of light in the morning. It's pleasantly fragrant.

I've seen this one referred to as as "commuter's daylily" because it opens at about the time many people get home from work. If you arrive home a bit late, you'll have to get a flashlight to see the blooms.