American alumroot holds its rounded, scalloped leaves through winter in mild climates, which makes it one of the few evergreen options for a native shade bed. Heuchera americana grows 1 to 2 feet tall and wide in part shade to full shade, hardy from Zone 4 through Zone 9.
The foliage does the work here. Rounded and scalloped, often marbled with silver or bronze over green, sometimes flushing purple in cold weather, forming a low mound that stays presentable through the season and into winter.
Slender wiry stems carry small greenish-white flowers above the leaves in late spring. They are subtle rather than showy, and bees visit them while they are open.
This grows wild in dry woodlands and on rocky slopes across most of the eastern half of the country, so it handles dry shade and root competition better than most perennials. It wants soil that drains, since winter wet is what kills heucheras. Deer leave it alone.