plant that grows from a relative of the Yam family?

[Monique Reed]

D. bulbifera does make aerial tubers.  They look a lot like potatoes,
which has earned the plant the common name "Air Potato."  It's
commonly cultivated as a curiosity.  In some cultivars the tubers are
edible.  You can see an image at:
http://botany.cs.tamu.edu/FLORA/dcs420/fa08/fa08071.jpg

M. Reed

David Hershey wrote:
 Hortus Third also says D. bulbifera produces
> aerial tubers,