There are 23 species of Hardy Cyclamen and several of them are easy to grow, zone 4 winter-hardy plants that are grown from corms. These hardy cyclamen include Cyclamen hederifolium and Cyclamen coum.
Cyclamen leaves emerge in the fall and are the main ornamental feature for most of the year. Cyclamen leaves are usually heart shaped and have silver variegation patterns that vary from individual plant. Hardy cyclamens typically flower over a two to three month period with little pink, purple, or white flowers that hover just inches above the ground.
Growing hardy cyclamen beneath a tree is an ideal location. The plants receive sun and rain needed during their active growth period, but also have the soil around them kept fairly dry during their summer dormant period.
You can buy several hardy cyclamen varieties, along with other unusual bulbs at McClure and Zimmerman, Their website is http://www.mzbulb.com.