foetidus, H. lividus, and various hybrids. Some varieties have been bred to survive in Zones 3 or 4 as well, which means you can find a hellebore that will grow almost anywhere in the U.S. except ...

One of my favorite hellebore species is the 'stinking hellebore', Helleborus foetidus, so named for an unpleasant odor emitted when the foliage is crushed. This species has striking yellow-green ...