I will endorse the exquisitely fragrant Hesperocallis undulata - desert lily. One does not see it in nurseries or gardens. I have tried it from seed obtained from Aqua Fria Nursery with germination success, but I believe it needs to be grown indoors or in a heated greenhouse. I have seen it in Arizona's Death Valley along the road in April. The trumpet-shaped flower has a white interior with gray-backed petals. As beautiful as it is fragrant. Jerry Murray - Washington, the state