
A perennial vine with elegant glossy leaves, Chinese mountain yam can grow up to 15 feet tall each season. It blooms in late summer and produces underground potato-flavored edible tubers which store well and can be kept in the ground all winter. Tae Hak Lee, a UofO nursery intern from Korea, said that his family uses the slippery juice of the tubers to soothe sore throats. Plants prefer full sun and rich soil but can tolerate clay soils and partial shade.
The Apios Institute has collected interesting photos and stories about Chinese Mountain Yam at http://apiosinstitute.org/dioscorea-batatas-chinese-yam
Ken Fern with Plants for a Future provides a nice summary of their experience with Chinese Mountain Yam at http://www.pfaf.org/user/cmspage.aspx?pageid=60