One of the most important considerations for putting the right plant in the right place (RPRP) is the amount of sun that an area receives. In shady spots, many options are available, as long as consideration is given to just how shady it is. Some perennials are adaptable to more than one level of shade, so they are included in more than one list below.
Lily of the Valley
Lily turf (may not be totally hardy in Nebraska)
Lily of the valley